One reason for frequent switches was switching of health insurance.

The other reason was that diagnosing my hypothyroidism was super hard, there are a ridiculous amounts of shitty quality endocrinologists out there, including many doing things that they shouldn't (like abusing ADHD meds for weight loss to the point the government had to step in and ban several ADHD meds, to the detriment of actual ADHD sufferers)

probably english isn't his first language and he meant "doctor".