There are some things society thinks people should not be allowed to be legally tempted with. Some people think one of those things is social media for people under a certain age.
It wasn’t absurd. It established that pretty much everyone agrees that government intervention is sometimes needed to protect people from their impulses. The idea that everyone (especially kids) can simply exercise self control when it comes things as addicting as social media is absurd.
Yes. There are some things so unhealthy that it is worthwhile to try to prevent people from using them. Heroin is one such substance in some peoples’ mind. Gambling is something that can be very addicting and destructive and as such society tries to keep kids from partaking in it. Similarly it is wise and worthwhile to keep kids off of social media.