Agree with you about the magical mexican clinic sounding a little too good to be true.

However, I can totally see doctors in the US and Europe ignoring or not knowing about the latest treatments for conditions. As I've aged and watched my parents age, We've dealt with several conditions where doctors have no idea and at some point they just think you're making it up. It feels like most doctors are just barely showing up to work mentally. If you don't fall within the dozen or so conditions/treatments they are familiar with they throw their hands up.