> the presumption that disabled individuals are so fragile

No such presumption. Lots of people, especially kids, can become traumatised by bullying. This argument seems like concern trolling to be honest.

> and those people _willingly_ decide if they want to use it or not.

Children can willingly decide to gamble or buy a beer but we as a society don't let them. And we don't just leave it up to the parents in those situations either.