Maybe they tried but the founders rejected. The founders created another company that was acquired by Apple and worked there for a few years. Probably not a fun place to work for ambitious engineers who want to build AI products.
My advice for people like you is to try a super small dose (e.g. 1/8th of a "normal dose"). This will hopefully take the fear away as it will have minimal (if any) noticeable effects and is a baseline to work up from. The people who have bad experiences are the ones that take a large dose the first time they try something.