There are those who like to use cw as click-bait. Blecch!
And, there are some who use cw for giggles, on deadly-cute kittens and such–kind of annoying, but... awwww. :-)
Section 230 allows each of us to be our own editors—which includes bearing the responsibility & ramifications of our editorial choices, be that a block, unfollow, or indictment.
Lack of 230 imposes content responsibility on those who run the servers–forcing censorship by proxy.