And 4chan has already been the recipient of government scrutiny, including a lawsuit attempting to shut them down.

Valve hasn’t openly stated they are like 4chan though, they may correct it if pressured since it wasn’t their explicit goal to be a right-wing safe haven. Maybe it is but they haven’t been open about it yet. 4chan is a lost cause when it comes to this, same as kiwifarms. They do not care and will not budge. Valve might since they need Governemnts not to ban them or publishers not to pull out else they lose money.