> This also isn't negative for free speech as a value
Free speech is a right in the USA, not a "value". It isn't something we strive for; it is a basic right.
Things like film ratings are not legally biding for example. The industry took it upon themselves to create ratings as guidelines to parents.
> - Require age verification by law and ban kids from using it. We ban kids from alcohol we should ban them from this.
As for alcohol - purchasing alcohol isn't a protected right and not analogous to speech at all.