I’m not surprised this is true. In my experience trying to figure out what’s wrong with me, my doctor did the following: ask questions about my lifestyle and diet (perfectly normal thing to do). Finds out I don’t eat a lot of meat and tells me i probably have a B12 deficiency and should take a supplement or eat more meat. Does some basic tests and do not have B12 deficiency. Tells me I should still try to eat more meat or take a supplement before sending me to an endocrinologist (you know, because it’s not my diet and something else entirely) 🤷🤷🤷