Most people are unhappy with what they do. A job for them is simply a means to an income. They don't know what it's like to feel that your career is a calling and the pure joy of doing what you love doing to get your paychecks. They are always critical of people who do.

Agreed. I've known many in the health-care industry and can echo your findings -- they have a legitimate calling to help other people and they work their asses off to do just that!

Then, you have the rest of the posse... This is the crowd of administrators and managers and hangers-on that realize that (1) People will pay anything to stay healthy and alive and (2) There's a whole subset of the industry dedicated to squeezing every dime out of them. This is where the (American) system starts to break down. We start pretending that healthcare is a traditional business and money becomes the focus. "Love of all money is the root of all evil."

If you want to improve health care in the U.S., you need to take the notion of profit-and-loss out of the system. Get rid of the "businessmen." Heck, I'm enough of a pinko commie to say "hang the businessmen" and ditch capitalism all together.

Then we can address the issue of a physician that's dumb enough to use Windows 10...

What is sad is that good health professionals are tainted by the opportunists that use and abuse the publics trust, causing suspicion of all within the industry.

Many are in it for good reasons, nut not necessarily the right reasons.. that is to say it might not be their natural vocation..but it doesn't mean they are incompetent or greedy.
Maybe it was parental and family expectation. Maybe it was self-delusion.
Perhaps for the prestige and social status and all the benefits that brings for self esteem etc.
Who knows what motivates some people?

It's so complex.

Some are in it for the money, probably those with private practices. I'd say too that most dentists are in it for the money - I don't trust a single dentist not to do unnecessary work on my teeth.

I would hope that most people go into medicine for altruistic reasons, but the new religion is neoliberalism.

Sadly professionalism, ethics and empathy are frequently regarded as dirty words or childish yearnings these days. Similarly the use of foundations are frequently ignored.
End result a world of empty hollow people.
Have a read of the 5 laws of human stupidity
[en.wikipedia.org]