FCC rules are in place because those things you mention are a part of the commons. Publicly-viewable by anyone, and also exclusionary: someone broadcasting on particular airwaves or putting up advertisements takes up physical space that no one else can use.

That's... not the same as a service on the internet, at all.

You're also talking about a completely different regulation regime. The FCC rules prohibit certain (fairly narrow?) things, largely "obscenity". A regulation that requires a company to actively promote certain things is... not even remotely the same.