The problem is that this drug is used worldwide as excuse to put in jail a lot of people also. Health issues aren't the only issues here to adress. This boy has now a bullseye painted publicly on his back and will be targeted in a few years by several kind of predators.

On the other hand, this "just put them to sleep all day" is a particularly outrageous "solution" for autistic children, that often are very smart and sensitive people and deserve to be respected and loved, as any other children.