Quite simply, gravity is by far the easiest and most consistent explanation for our universal observations
Except for the part where the scientific consensus acknowledges that it's not consistent, and that a the model needs to be improved before it can be considered accurate. But hey, let's not let that get in the way of your beliefs.
As far as I know, all "Laws" have a limited scope where they are known to be accurate.
The gas "laws" fail at extremely low and high temperatures and pressures.
Newton's "laws of motion" fail at extreme velocities (approaching "c" - UA would be deeper doo-doo without it).
Neither Newtonian gravitation nor GR fits into Quantum Mechanics.
I don't doubt there are numerous other cases.
In other words essentially all of the "Laws of Physics" have a limited range of validity.
So, Newtonian Gravitation or even General Relativity may not be applicable on a very huge or very small scales.
Both, however, explain gravitation very accurately in our local environment and even over the whole of the solar system any corrections are minute.
But, and this is the crux of the whole matter, you would have no idea about these "discrepancies" if they were not publicised by these scientists that you claim are so dishonest!
So, what about sticking to
the here (let's say earth, Solar System and the "nearby stars") and leave cosmology to the cosmologists, and
the now (say recorded history), and leave the origins to those who like delving into the dusty past.