They do not provide a necessary public service; it's not drinking water or heat, you would be perfectly fine existing without Facebook. It's their private platform, they should do what's morally right by them, which is apparently doing nothing.

Ok, so using that exact line of thinking.

Netflix isn’t a necessary public good or service - why can’t Comcast throttle it? Is it because I don’t get to say what you do or don’t use Netflix for? Then why does someone else get to determine what political speech I do or don’t get to see? They’re both over the Internet aren’t they?

It’s far more nuanced than “they’re a private company”. Even at base level let’s say FINE, you should still want them to follow the spirit of free speech especially if not required to do so.

I respectfully disagree. When a handful of "private" companies control the dialogue of the populace, it becomes a defacto public service. Similar to anti-discrimination laws, "private" companies should have to respect the underlying principles of free speech.