Fortunately, there is a path that does not abandon their original goals. Many enter graduate school in a biological science program. As a researcher or a professor, they still have the opportunity to work in the field of biology while interacting with people, their students. A graduate school program in the biological sciences is geared to prepare students in research. In general, the first years are spent completing required classes and rotating in different labs to get a feel for what they want to specialize.
Students then complete a oral examinations to be considered a Ph.D. candidate.
After completing their dissertation, Ph.D. s are awarded. Many believe research work better suits their personality, lifestyle and goals. I was just too curious and I realized that there was little time for questions under these circumstances. Gary Gaufo, a Ph.D. candidate in endocrinology who also plans to teach in a medical school setting in the future, cited similar reasons. I do not want to merely accept present dogma, but want an active role in creating new dogma.