I think you're ignoring the context in which I originally replied in this thread.
"Dual n-back, coffee, LSD. All things people swear make you smarter."
It's not up for debate that people find a benefit from LSD. Or any drug. It's literally the reason that people do drugs in the first place. The question is whether or not they make you more intelligent. Able to process information more quickly and accurately. And to that my answer is a resounding no.
And call me crazy, but yes, I do think you should approach an extremely powerful hallucinogen whose dose is measured in micrograms with some rigor and discipline. The potential harm to someone's mental state is a serious risk of LSD that people tend to under appreciate until they've seen it happen to someone.