The analogous action is to only require age-restricted sites (or parts of sites) to check ID, not the entire Internet. e.g. no one is calling for mathisfun.com to check ID. I'd expect most parts of the web are child-friendly and would not be affected. Just like how almost all locations in physical space don't need to check ID.

Additionally, the laws I've read mandate that no data be retained, so you have stronger legal protections than typical credit card use, or even giving your ID to a store clerk for age restricted purchases (many stores will scan it without asking, and in some states scanning is required).

This might have the benefit of reversing the trend where everything on the internet was rolled in to social media. If social media is age restricted, news, announcements, etc will have to break out to dedicated websites if they want to be accessible by all ages.

just ban kids from the internet already. if a parent allows the kid to have a full function smartphone and the kids get caught with it then throw the parents in jail and kids in an orphanage. people will catch on.