If you really believe Russia can’t defend crimea, you’re the stupidest bot ever programmed.
It’d be Stalingrad 2.0
The question is whether Russia can supply Crimea in the face of GMLRS/GLSDB from HIMARS. No supply=no defense.
They couldn’t supply the Kherson bridgehead in the face of that, and all they had to do there is cross a river.