That said, the article title is very misleading. It's essentially a (very) thinly veiled hit piece on Musk. As if we need more of those on HN. A better title would be "What Ketamine could be doing to Musk's brain, which would explain explain why he's so crazy/evil/nazi -- and why you should continued to be scared/panic/etc"
I can imagine frequent use of any psychedelic (or any drug) being correlated with all sorts of other mental and inhibition issues. That's not new/news.