Doctors don't even listen to other doctors
I once drove my partner to the ER in Calgary because he was having stomach pains. I told him it was probably appendicitis.
The ER doc admitted him overnight. I'm guessing he didn't meet all the criteria for appendicitis. His appendix burst. They inserted a drain and kept him on lots of antibiotics to let the appendix heal.
When my partner was released the surgeon explained that even those the appendix had healed, chances of another incident were much higher. The surgeon gave him a letter and told him to present it at the hospital in similar circumstances.
A couple of years later we moved to Victoria. When I took my partner to the ER this time, he presented the letter and explained he had the same feeling, etc that he had the previous time. The doc did tests and sent him home. Told him to come back the next day if the pain persisted. When we returned the next day they removed the appendix.
Appendicitis has got to be one of the primordial surgeries in modern medicine. It is far from a rare condition.
If multiple doctors in major hospitals can't get a relatively simple condition right, with no other underlying problems in a healthy 25 year old male, treatment of complex and chronic conditions lags much farther behind.