So, I looked him up. If anything my biology teacher was being polite.
https://en.wikipedia.org/wiki/Kary_Mullis#Views_on_HIV/AIDS_...
https://alumni.berkeley.edu/california-magazine/winter-2019/...
EDIT: My opinion is that this is a case of a broken clock being right twice a day. The second article talks about his PCR breakthrough. It sounds like he was clever and lucky. But based on what else he seemed to have believed, I really don't think we should take his word on the LSD being the key.