And IIRC an association with seizure reduction (generally, not kids) was observed as early as the 1940's.

Blind, excessive, political criminalization kept this avenue officially closed in the U.S. for three quarters of a century. (Call it half a century, if you include those who started medicating and self-medicating despite the law.)

I'm not a recreational user. But I oppose stupidity and self-interest standing in the way of progress.