> Exploring how chemicals affect your brain is fun if becoming a different person is fun. So don't do it unless you're sure you dislike yourself.

This sentence isn't really logically sound. There are lots of reasons to make a transition from a place of satisfaction to a place of uncertain satisfaction. Happy people often explore!

Aside, 'Becoming a different person' implies a large amount of permanence. I'd really enjoy seeing this assertion sourced. Especially with regards to one-time or infrequent use of psychedelics. Could you point me to anything you've found particularly convincing?