A lot of people in the medical field (of both genders) I know cut back their hours once they can control their schedule in private practice - if you're still going to be making 3-5x of what would be considered a good salary working 50-75% of whatever is considered full time (usually in the 30-35 hours a week range), it just makes sense. Then again, this applies less to technology and other knowledge work where it's h…
Are there any doctors actually in private practice now? I've found most have already sold their practices to hospitals or some kind of provider network, and they are told the patient load they must provide. It's just not economical to stay independent and reduce your workload.
Most doctors don't want to engage with a crazy actuarial accounting, hence they outsource it, which can be a reasonable tradeoff.
Nuking that system from orbit with universal single payer would solve this, and also have the beneficial side effect of eliminating the coercive practice of employer-linked health care, which would lead to reduced barriers to entrepreneurial activity.