Nah. David Nutt is criminally dishonest. I've read his book (Drugs Without the Hot Air) and it is a straight up propaganda. The guy cherry picks a lot of his evidence and it is a chapter after chapter of half truths and lies by omission.

Of the top of my head I can recall Nutt's chapter about LSD, where he claims that the LSD is very safe and even mentions Kary Mullis (a guy who invented the polymerase chain reaction and got a Nobel prize for it). Nutt builds up hype around Mullis (and to be fair, Mullis' academic accomplishments are impressive) and conveniently cites Mullis saying that he took a lot of LSD and that LSD was more important than the coursework and that he couldn't have invented PCR without LSD. What Nutt conveniently leaves out is that Kary Mullis is batshit fucking insane. Mullis denies existence of AIDS, denies climate change, believes in astrology, left science couple of times to operate a bakery and write books, talks about meeting and talking to a glowing green raccoon (yes, seriously). So... maybe... just maybe... LSD has something to do with that? Wouldn't it be at least a little bit dishonest to leave that other (weird) part of Mullis' personality?

edit: removed a paragraph with my thoughts about friends who do psychedelics.