The 'medical community' has been quoting figures from the same, *one* shoddy 19th century study for all these years, and it has been recently proven to be flawed.
I actually trust this 'one guys study' more, yes, as Professor Glantz actually *bothered* to do a modern investigation of the matter which the 'medical community' had neglected to do for 200-odd years.
Again, if nicotine was anywhere as deadly and toxic as you believe, we would be seeing a *lot* of poisonings and deaths, especially with the rise of DIY ejuice and vaping in general - but we don't, do we?
People haven't really been historically handling concentrated nicotine preparations, so the wrong figures were easily believed for a long time - now many public people are handling it all the time, it's self-evident just how overstated the toxicity was...