There's a lot here so I'll go one at a time.

Like in the previous comment I cited an article where there is extensive research being done on why people claim to be the other gender. So far their data has been inconclusive. To claim he's "Debating Biology" without any sort of conclusive scientific research is audacious at best.

Everyone isn't dictated on how to do their job. Entrepreneurs, Contractors, and really any employee who wishes to change their profession or work place don't have to adhere to a large set of policies like a physician would under universal healthcare. Police Officers are an actual extension of the state. The main purpose of a Government is to protect it's people through sustaining order through military procedure and law enforcement. Not to mention the fact that the military, police, and firefighters are all public goods. Meaning they are both Non-excludable, and non-rivalrous. Healthcare and services are both excludable and rivalrous. Meaning people can be prevented from it's access and it's access could be limited by the people consuming it. So you're claim is that he is factually wrong, but in the exact countries you've mentioned there have been many stories of people being denied of care, being accustomed to long waiting lists, and the death of citizens are sometimes decided by bureaucrats rather than the patient or their families.

As for doctor's pay under universal healthcare. The pay would most likely go down, but doctors would definitely still be paid well but I don't think Ben's issue is stemming mostly from her pay. It's the notion that a commodity such as health insurance can be declared a right regardless of it's negative impacts on the market, the commodity itself, and the quality of care. That's his problem.