Almost everything that a starship can do that's worth writing home about is fucking ludicrous. Somehow, being under water is being singled out, even though we do shit like that all the time
in the 21st century.
But hey, we've never seen it before so off with their heads and so forth.
It's really not a fan uproar. Look at this thread for evidence of that. There's just a select few fans getting their panties in a twist over it. Makes me wonder: Did these people ever even like Star Trek
? Or were they just in it for ship porn? TOS was almost never about the goddamn ship.