>A friend at the time took it [LSD] and killed themselves a month later.

Do you think the two events could be otherwise related?

As you then say "Point is there are no absolutes and a lot of romanticism and anecdotes around it when we need science."

>...does taking psychedelics have a general positive or a general negative outcome?

It's a great question, but banning it, so the quality of the chemical supplied then may be suspect, and the dosages may be wildly different - and seeing what happens over 60+ years was an incorrect move.