an exo-colonist is an off-world space colonist
also, you have to study long & hard, and do residencies and other cool things, in order to become an oncologist. if someone can be licensed as an oncologist as a teenager, it tells me 3 things:
- they are a super genius
- everyone on the state licensing board needs to be shot for their gross oversight
- the system has clearly failed at some point
you have to be an adult to get into medical school in the first place. teenagers are just not psychologically mature enough to become licensed doctors
also, in case you have a certain rebuttal at the ready, this ain't the 1800's anymore; we're now in the 21st century and people take longer to grow up, so... no, that argument won't work here. case in point: you still play video games!