How so.
Explain the fine points for me.
The theory of gravity is more than, "it holds you down".
A lot of theories also break down at the nuclear level.
Hence neutonian vs nuclear physics.
Also, object do not fall at 9.8 m/s. Their gravitational constant is that (rounded off ), on earth.
Their fall is also affected by wind resistance, air speed, etc.
All of Einstein's theories have been, and still are, debated.
Even his formula for nuclear energy release.