I assumed it was clear what I meant,
Unfortunately not. There are many individuals which are dissapointed due to the failed efforts of the blanket bans, but ultimately stand for them.
Aside from that, this problem is defacto already partially solved. As you said parental supervision - parental controls are proven to be extremely effective at what they do, if they are utilised correctly.
But even so, you are highlighting the need for separation of developing minds even if that statement has no basis on age. If you're serious about it, then the whole internet should be designed to be safe for everyone.
This is literally the illustration of most things within the world. The corporations/governments rather muddy the waters than actually do what has to be done.
Praise is given for effectively doing a cheap act of "niceness" that is more harmful in the long run. It is a method of deceiving the public, and taking advantage of a minority to precisely execute their evil intentions.
In this case, disability is one thing, but age and other factors are also used as a leverage point.