I know at least 10s of nurses and two doctors (one of whom is a high-paid specialist, the other of whom is an *extremely* high-paid specialist and researcher) who are outright creationists. It doesn't affect their work quality in any way. If anything, their strong Christian beliefs probably make their work better.
I'm an evolutionist, so I think they're wrong. I *know* they're wrong. But the fact is that it doesn't matter for the work that they do.
I agree with you that many researchers need to understand evolution, but that's very very few people. And I'm not saying it shouldn't be taught. I'm just saying that for the vast majority of people - including health-care professionals - it doesn't matter.
The same goes for advanced math, most of science, literature, etc. Most people don't use most of their education in their day-to-day jobs.