It would be a cleaner argument if Facebook merely viewed itself as a platform and a government found the need to restrict it within their boundaries, but Facebook has it's own rather mysterious law that it applies in an arbitrary fashion.
They only follow the law, kind of, or they skirt around it until someone holds a fire to them. And they can still threaten to pull out most or all economic activity from a country as "punishment".
It is clear to me that there is some sort of regulation that needs enacted against multi-homed and distributed companies. Now how that is enacted across most countries in the world, I don't know. Cooperation seems to be somewhat lacking these last few years.