I’d venture to say that virtually all docs perform free work on occasion. I’ve never met a doctor (not that that is anything but an anecdote) who went into the professional purely for the money. And I have a fair number in my family.
But that’s not a valid formula for providing healthcare to a general population. In other words, it has to be the exception, and the rare exception, given the overhead on offices, staff, malpractice insurance, supplies, and plenty of other things. Plus the general certainty that 100% of the population will need to see a doc for something at some point.
Charity, by definition, is voluntary.
Leftists are “charitable” with other people’s money. That’s often their concept of a good deed - voting for someone who will steal someone else’s money, to give it to someone else, in turn.
With their own cash? Well, they are Scrooge McDuck.
And more importantly, done at the individual physician's discretion.