I have two friends who are doctors who decided late in college to become doctors and attended the post-college baccalaureate programs. One is a professor at Harvard Medical School. He was told by his advisor in the post-bac program that he would never get into medical school. The other was a psych major and went on to get a MPH as well and led a state’s public health program, I think, before heading to the private sector. Both really enjoyed their careers.