They do have a regulatory shield though. Section 230 allows platforms to moderate their sites, while leaving them not liable for any content they do leave up. It's considered speech of the user.

This has come to a head as plarforms have grown larger. Note that even if some platforms were strictly neutral, they'd still be affected by the changes the government is proposing. It would have been very unlikely that none of the major platforms would have moderated beyond legal minimums.

https://en.m.wikipedia.org/wiki/Section_230_of_the_Communica...