I’m the antithesis of a kumbaya type, I’m a coldhearted detached sort and a scientist by nature, training and profession; individual biochemical differences are indeed a valid thing and def factor in to which dietary regime shall work for a given individual and no, keto is not the regime for all.
However THIS^^^^ outlook -seeking loopholes to sabotage and cheat- I agree is common and will likely lead to a disastrous result.
lol) for a couple years of my 54, and thought, “Holy crap ! I look like like a male model” (used to love the mirrors in the Underarmor outlet fitting rooms, as they were just low enough to cut my head off
… Except this one big buff black guy, and I’d have to give him the nod… If only I had 3 more years) … Then shortly after that, I had my back injury… And that hurt me as much mentally, as it did physically 
would have been good for my back.

