he's applying a narrow scope of medicine to everyone based on his own patients, which makes it anecdotal because you cannot apply a narrow scope of results to everyone

You touch on something quite crucial here. I think that many practicing clinicians will be in this same situation if their approach is along a specific method (whether keto, plant based, carnivore, Paleo etc.). It will be working for their patients, so in their experience it must feel like it works for everyone. This doesn't take into account those who might have left because it's not working for them and have found another doctor with an approach that they find works better for them.

While my preference is to gravitate towards those who are more open minded with their approaches, I can kind of see a use for those who are extreme on their own approaches for those who it's working for. They are well versed and experienced in that small area and can guide people who work better when told what to do. That said, these are also the kinds of people who are easily led when you've got someone who declares that their way is the best way for everyone. Usually most of these doctors when pressed will concede that other ways do seem to work for some, so hopefully they aren't unsalvagable.

It's true,you really can't apply a narrow scope of results to everyone, which is why I believe that everyone should have a tailored approach rather than a blanket approach. I think that can tend to bring the responsibility back to the individual, because it's hard for one doctor to learn about everything. Either that or teams of specialists who can refer patients to where they might get better guidance for their own circumstances, if that makes sense.

I can't say I've noticed Gundry's glasses, I actually find he grates on me a bit, so I haven't listened to him much. Could even be that it's the flamboyance I struggle with. 🤣