Of course, that can happen with any treatments as well. However, professional support could maybe mitigate that a bit. Plus actual data may give a better idea of likely outcomes.
He then came home and took LSD that caused an episode of psychosis that lasted a couple weeks and landed him on the hospital plus in trouble with the law.
I don't disagree that these drugs can be beneficial for many people and should be studied but there is dangers as well and the dangers are often downplayed as "just anti drug FUD."