Doesn’t matter how hard you stick your fingers in your ears and yell LALALALALA the facts are the facts and the facts are LSD has no long term effects.
Tell that to Syd Barrett, Brian Wilson, Peter Green... on infinitum.
You know, that is what they used to say about marijuana, but then the first and only long term study proved that there is a very strong negative effect of marijuana among heavy teenage users. The marijuana study showed that adult brains are more resilient than teenage brains and are able to fully recover from marijuana, while teenage brains do not recover.
Maybe LSD could work the same way.