In point of fact, US law defined (via the DMCA "Safe Harbor" clause) most communications-media products (fora, video sharing sites, music repositories, etc.) as pipes for this reason. "They're pipes" is how the US regulates them.
In general, yes. SESTA/FOSTA nudged the definition of the safe harbor away from content that facilitated sex trafficking. This has no bearing on whether, say, iTunes is still safe in sharing the subversive, anti-government music of Creedence Clearwater Revival. ;)