I suspect social media companies don't like the message because they don't like the costs required for good moderation. They don't really care about free speech, that's just spin.
It's probably simpler than that. Their earnings are proportional to click-baitiness, so they optimize for that. Moderation is probably more akin to a water pump on a ship: its purpose is to keep it afloat. Free speech is probably just passing regulatory nuissance that moderation has to account for.
I'd like to call Occam's Razor, but, then, when has it become that the most selfish interpretation of an organization's motivations is the simplest one? Maybe it's simple simply because it aligns with my beliefs. Something to ponder.
Come on, Zuckerberg never designed FB with freedom of speech in mind, it started as a campus thing and transformed into a money printing machine, he may or may not care about freedom of speech but it's irrelevant, it's nowhere near the top of facebook priorities.
"Freedom of speech" is the new mantra you have to repeat if you want Americans to stop thinking about a problem.
This is as true as saying "more code = more programming" -- possibly a technically correct statement, but if your goal is to create something valuable (to your business, to society) this won't help.
I'd like to call Occam's Razor, but, then, when has it become that the most selfish interpretation of an organization's motivations is the simplest one? Maybe it's simple simply because it aligns with my beliefs. Something to ponder.