[bwesz]

Because if you have a website you are legally liable for what someone else posts if you don't remove it within 24 hours of a report, which makes running a social network impractical. (NetzDG, KoPl-G, Digital Services Act (DSA), etc)

Having actual free speech would solve that (and a lot of other problems).

[regularjack]

What do you consider to be actual free speech?

[Dudeman112]

Is that solved for American websites?

[jmaygarden]

Yes. See 47 USC Section 230.

https://www.law.cornell.edu/uscode/text/47/230