Preventing people from disputing claims of fact makes it harder to find out if those claims are actually solid. Same for arguments. https://www.goodreads.com/quotes/66643-he-who-knows-only-his...

Preventing people from having a platform for content-free asshattery doesn't have that problem.

(A fun implication of this line is reasoning, is that the claim that Kimmel's comments were "lies" makes the jawboning against him more morally bad rather than less bad.)