If I understand this correctly, its not about adding ID requirements. Its just about adding the functionality to every part of the software stack to go "oh, this is a kid, let's not show them ads for adult apps or new stories about mass murder" etc etc.
Less of a "papers, please" check, more of a robust "you must be this tall to ride" check.
I found this very compelling, but when he started praising the current presidential administration it began sounding more like libertarian anti-regulation propaganda than a legitimate critique.
The sources seem good so there's merit for review, but I don't think the solution is "assume everyone has the same level of biological repair ability and abolish the current safety measures of the industry".
Cancer is also not the only harmful thing radiation does - you can also get infertility, birth defects, etc at lower doses.
Courier, bring me more mouse bites