Well, it's always wise to question everything - every moment is an opportunity for enlightenment. Unfortunately, people of all ages have a tendency to not think enough - with elderly people tending to experience further cognitive decline the older they get.
Since I am vegan, I'll just point out that a lot of the time that people point to others as seeming to 'brag' about being vegan, the person is simply doing what they can to try to motivate other people to stop paying for the torture and abuse of animals. ;)
The pdf opens fine for me here, it's pretty big though - so you might just need to wait a while.
I was plant base for two solid years. I now have a blend of what works best for me which includes seafood. Dude.. I know you know what I mean!
Anywho, seems I can't meet anyone today without them announcing I'm vaccinated.. I'm vaccinated.. I'm vaccinated etc etc.
Check this out. I had a doctor tell me last week "I'm not wearing a mask because I'm vaccinated and there's no law that says masks are required after vaccination." I couldn't help myself but instinctually react: 'You're a doctor who favors 'the law' instead of the vaccine you're vaccinated with?' 🤔 Yeah, uh... just gimme my panel results and I'm out.
I think people are terrified of being ostricised and cut out of society. IF they were convinced they had to be circumcised to 're-enter society', they'd probably all be getting their winky out for you. lol
Unfortunately, the average medical doctor may know a lot about drugs and various things, but when it comes to imagination, creative thinking and general problem solving they don't seem to be above average - or even at the average in society. Still, they have a white coat though - so that's something to trust. :)