Gravity has no place in the explanation
Of course it doesn't. No one can explain it...not even you.
And there you go ignoring everything that shows you are wrong yet again.
When will you grow up?
Once more, gravity has no part in the explanation because it simply is not involved.
All that is needed is action-reaction.
This is not an issue for gravity. Just like gravity not being involved in explaining how paints dry doesn't mean there is some problem for gravity.
And again, I CAN EXPLAIN IT!
As I have.
The person who can't explain it is you.
Once more, person pushes against ball, with the mass and thus inertia of the ball providing resistance to that force and subsequent acceleration causing the ball to push back, and this "push back" accelerates the person.
Conversely if you replace the ball with an object of low mass, but the same volume (which according to your delusional nonsense means that when you move it you move more air), it has significantly less resistance, due to its much lower mass.
Entirely consistent with reality and my explanation, but directly contradicting your fantasy and your "explanation".
The silly part is, you know you can push the air out of a strongly built rubber cup whilst it is placed on a surface.
You know you will have an absolute struggle trying to lever that rubber cup off that surface.
Yes, because we understand how air pressure actually acts.
The partial vacuum created when you try to pull the rubber cup off that surface creates a tremendous pressure differential which results in a massive force being applied.
We understand that without the air pressure, that does not work, yet things still fall.
We also understand that without a seal and thus without that partial vacuum and pressure gradient, it isn't difficult at all.
This also means that we understand that if you break the seal by applying enough force to pull the object off the surface, it just lets go and there is then no significant force required to pull it.
You are clearly trying to compare this to a heavy object, that but works nothing like air pressure.
The object is heavy without any seal. It is even heavy in mid-air, with no surface for it to be clamped against.
It is blatantly obvious that air pressure is not at play because it is blatantly obvious that there is no significant pressure gradient acting on the object (and the insignificant pressure gradient that is acting on the object is acting in the wrong direction).
Again, your delusional nonsense has no connection to reality.
Stop trying to equate fundamentally different situations.
Again, gravity not being at play in explaining how paint dries is not a problem for gravity.
Stop trying to pretend gravity should be able to explain everything and that anything it isn't involved in magically disproves it.
There is no need for your delusional nonsense, and your delusional nonsense cannot explain it.