Why does gravity just pull and not push?

    Why does gravity just pull and not push? 

Gravity makes potholes or wells, not hills. Or actually, we can say that the gravitational center is in the gravity pothole. The problem is that we don't know what gravity is. We know that gravity is the force that pulls particles together. Gravity is radiation like all other interactions. And that means it should act like all other fundamental interactions, electromagnetics, and weak and strong nuclear forces. 

Why do we sometimes talk about gravity hills, when we talk about black holes? In that model, gravity is one energy form, and gravity hill is the same thing as a gravity pothole, but to make that thing easier to model, we, or at least I turn that pothole upside down. And that's why gravity wells, gravity potholes, and gravity hills are the same things. Same way talking about gravity hills when we should say gravity potholes makes it easier to model gravity waves. It's easier to say that a hill sends gravitational waves than some gravity wells or gravity potholes send those gravity waves. But as you noticed, gravity potholes send those gravity waves. 

"Einstein’s general relativity explains gravity as the result of spacetime curvature due to mass, contrasting with magnetism’s dual ability to attract and repel. This theory introduces the concept of gravity wells, central to understanding gravitational pull. Credit: SciTechDaily.com." (ScitechDaily.com/Einstein’s Insight: Why Does Gravity Pull Us Down and Not Up?)

"Earth curves spacetime so that you fall toward Earth instead of away from it. Credit: Tokamac/Wikimedia Commons, CC BY-SA" (ScitechDaily.com/Einstein’s Insight: Why Does Gravity Pull Us Down and Not Up?)

We can say that the low gravity area is some kind of hill, and then gravity will pull things from hill to pothole. So if we think of some other natural interactions. We can say the energy forms a hill when it is loaded to some particle. Then that high-energy particle starts to roll down from that hill, while it releases its energy. That means gravity should follow those rules. It should act like all other forces. 

If we think that gravity is the force that travels from the gravity hill to the gravity wells, we might see that gravity interacts the wrong way because gravity should travel from the gravity center to the outside. And that's what it makes. Gravity waves travel out from the gravity center. But they should push particles away. Another interesting thing about gravity is that it somehow causes quantum shadow or lower energy area in the front of the particle. And that thing makes quantum fields push particles into the gravitational center. 

There are two ways in which gravitation can interact with particles. The first one is the so-called superstring that interacts like a thermal pump. That superstring would pump energy away from the front side of the particle. And that causes quantum flow that pushes particles to the gravitational center. Or gravity can affect the quantum fields around the gravitational center. In both of those models, the gravity center should have a lower energy level than around it. The reason for that is energy travels always from the higher to the lower energy point. So gravity should also travel from the hill to the well. 

Can antigravity be possible? It can exist, but it can affect so small an area, that it doesn't have a visible effect. And maybe its so weak, that other interactions and gravitational pulling cover it. The reason why some people believe antigravity is gravity waves. Gravity waves can interact like all other electromagnetic radiation. 

If those waves impact with each other, that thing can prevent those gravitational waves from reaching some objects. But this thing is a pure hypothesis. The idea is that the system sends countergravity waves to its environment. And that should make the system act like a gravity jammer. But can that thing form an antigravity effect, or can that effect benefit in some cases are different things. 

The third interesting thing is that gravity also affects photons. Three other fundamental interactions do not have that effect. That thing causes an idea that maybe gravity affects quantum fields, not straight particles or electromagnetic radiation. In this model, there is some kind of low energy point in the gravity center. 

And quantum fields that travel into that point are like water. Those quantum fields would take particles with them to the gravitational center, where something pulls those quantum fields into another direction. That thing could be some kind of gravitational tornado, that acts like a thermal pump. 

The reason this kind of thing where gravitational waves don't affect three other natural interaction forces would be that the gravitational wave source is so small that the gravitational interaction cannot affect other fundamental interactions and their transmitter particles. Or there is the possibility that gravitational waves cannot cause so high a power rise that this thing can measured. 

Or gravitational waves hit an object so often that it cannot send that extra gravitational energy out from it. And that thing causes a situation that which low pressure at the front of the particle that travels to the gravity center will turn deeper. Then the quantum field behind the particle pushes it into the gravity center. That explains why gravity pulls stronger near the gravity center. The gravity tornado that pulls those quantum fields away from gravity centers is also explained a zero-gravity point in the middle of ball-shaped objects.

https://scitechdaily.com/einsteins-insight-why-does-gravity-pull-us-down-and-not-up/

https://en.wikipedia.org/wiki/Fundamental_interaction