I’m not so sure about that. I’ve seen quite a few videos of underwater structures which are solid, all in place, no earthquake damage, all 150 to 200 feet (roughly, IIRC) underwater.
I didn't communicate my thoughts very well.
Water, due to the force of gravity, always seeks the LOWEST POINT. The surface of the ocean , on a global scale, is smooth and flat. The land, is not, and is subject to constant CHANGE.
There are continents where the 'sea level' is rising on one coast, while lowering on the other.
Imagine laying out a large plastic dropcloth, leaving lots of 'lumps' in it. Then poor water around on it.
Now, pull on the edges of the dropcloth.
Is the water rising/falling, or is it the 'ground' moving that causes the APPARENT change in sea level?
underwater structures which are solid, all in place, no earthquake damage
Some 'change' is fast and catastrophic, some is very slow and actually preserves artificially built structures.