Even if you want you can't!

Tolerance to hallucinogens grows exponentially. If one take a blotter of LSD, wait 24h, then take another blotter, it will feel like [¼,½] of the original dose. If one wait another 24h and take another dose it will feel like [⅛,¼] and so on. With LSD one must wait a few day between doses to feel the full effects.

With psilocybin, the period of abstinence required to feel the full effect is measured in weeks.

I have no personal experience with Ayahuasca, but administered daily it is probably not too different from medical treatment with Isocarboxazid as the psychedelic component should dissapear and the MAO inhibition should persist.

Ayahuasca actually is different. There is no noticeable tolerance, unlike most other psychedelics.

I can't tell you as this particular example was a colleague that I didn't know that well, but from talking to him I don't think it's what you think it is. These kinds of drugs aren't really fun party drugs. They're deep, introspective, intense things that aren't fun at all. And literature shows hallucinogens generally aren't addictive.