A great big NO from me. I’m a retired physician. Allow ten years for the entire process- getting superlative grades in requisite courses, getting accepted into a medical school, spending the at least seven years in 16 hours or more per day seven days a week. Start practice around 60 years of age- when many physicians are retiring. It is one thing to put up with lost sleep when you’re young but I know of no physician who relishes the call schedule as we age. Our bodies don’t handle it as well as they did in our thirties. That’s not even considering finances.
I would hope no medical school would accept him over a much younger candidate. Society puts in a lot of resources in addition to the hefty costs to the student, we should expect much more time working. Also- even after residency it takes a few years to have experiences to be at your best.
There are so many other ways to earn a health care living. I know an RN who switched after being a college philosophy professor for many years. Two-three years then working. Plus, as above, many other technician jobs. His math bent may lend itself to being an ultrasound tech or other similar short programs.
There are times for some careers, not all can be started later in life.
He could work on his goal by starting the needed science courses and see how that goes. This assumes he can afford the time and the expenses. I would be shocked to find he becomes a physician. But, if he has the time and resources there is no reason for him to not take college courses in pursuit of a goal. He would make better use of his time with nursing however.