There is plenty of skepticism, even from during the prohibition era, which seems to be finally on the way out.

Harm reduction activists documented quite a few horror stories, seizures/deaths from LSD + lithium, HPPD, etc.

Psychedelics are promising, sure, but I doubt anyone serious thinks are some kind of panacea.

There is just not enough money in this whole thing yet to sweep skeptics under the rug.