With my former STEM admissions tutor hat on, I also wonder whether medical school is the right choice for your DD. She is obviously capable of it, and it is the most straightforward route into medical research. So if she decides it is for her, I definitely hope she will go for it.
But that isn’t the tone of your post. The interface of STEM and medicine is really fascinating: bio-engineering, bio-physics, bio-mathematics, genomics to name a few that I personally know a bit about. These fields are making exciting contributions to cancer research, neurology and numerous other fields. There is ample employment from PhDs to lab techs, though as PPs have noted at the higher levels all science is very competitive. (Positions are less scarce in America and on the continent than in the U.K.). A lot of this research is conducted by teams co-led by consultants/professors at teaching hospitals and university academics.
This is the side of things I am a bit familiar with. Of course there is the whole field of life sciences, to say nothing of chemistry, etc. I believe the same employment considerations hold. There are also a number of Life Sciene Institutes around the world, though the impact of their research on patients is a bit removed.
Big Pharma pays researchers quite well from what I hear! Although one can take issue with the morality of the international distribution of medicines, there is nothing evil about those researchers (and generally no other mechanism for drug development).
Your DD has many options, even if a medical degree does not suit her.