That is a solution only valid for US and for the current legislation since it was introduced in 2006. It can be changed at any time.
For example other countries may use of laws (EU Arricle 13, for instance) to bend social media [1], and Facebook has accepted to have Marlène Schiappa’s (our Minister of Equality) agents in-house. Law is the embodiment of the current political power balance, not a fixed referential to stake culprits upon. And for the moment, social media are the power in the balance, so it’s hard to use the law against them.