Chomsky has been known to be wrong for decades. His real talent, if not genius, was pivoting away from linguistics while his reputation was still strong, and managing to preserve it despite his original claim to fame being thoroughly debunked.
You may or may not think Generative Grammar (or his more recent Minimalist program) is correct, but it's certainly not KNOWN to be wrong, and has yielded some insights. Has it changed over the years, of course, that's normal science. New data is found, new explanations are posited.
Further, Chomsky is still heavily and actively involved in linguistics. See his Feb 4th 2021 presentation [2] to eminent linguistics researchers in the field.
I'm not sure where this kind of comment comes from?
[1] http://www.ugr.es/~fmanjon/A%20Review%20of%20B%20%20F%20%20S...