"I'd say medicine is always a concern for any civilization." Because Samuel is thinking of the group, not just himself.

"I've met some who know a few things about first aid... but if anyone needs anything more than that, like stitches or surgery, I'm going to be their best bet." Not that he's got a medical degree, but he has as much medical experience as any doctor (even if most of it is either with Pokemon or patching himself up), and he's pretty sure he's the closest thing this place has to a doctor.