I must disagree. I know 3 people who have been messed up by LSD. The first was my brother. He took some and had serious memory problems for years.
Another was a musician I know. A group he was touring with thought it would be cute to spike his drink with LSD. Well, aside from falling backwards off the stage, his brain has never worked the same since. If he weren't married, he would be on the streets. He can't balance a checkbook, or pay a bill or follow logic for very long. He can still play his brains out though, so at least he can earn a living.
The third is my good friend's son. His friends spiked his drink and it triggered a schizophrenic break which he has been working many years to overcome. If he didn't live with his mom, he too would be on the streets.
Oh, and none of these three is a long term user, and neither do they take other drugs. I have spent over 40 years in the music business and cannot tell you how many people I have seen ruin their lives with illegal drugs. No, I am not a user. I hardly even drink wine.
The plural of anecdote isn’t fact. Meanwhile nobody, not even the government trying to ban it, has found any side effects.
Because if he did not, you obviously don't know what caused his problems.
Which is, ironically, an argument in favor of legalization.