In addition to a tendency towards arrogance, doctors hold unconscious biases like everyone. Unsurprising.
Anecdotally, I recently had a same-gender doctor recount his glory day (just one day) in the ER solving a hypertensive crisis by syringe bloodletting onto the floor and tell me that my autonomic dysreflexia was “all in my head,” and that fixing stress was the panacea. Meanwhile myoclonus, nystagmus, anhedonia, (autoimmune?) inflammation/swelling, tremors keep getting worse. Thanks doc, you really solved everything.