I felt the same way, but I also know many current UCLA med student from my undergrad school who also have extensively worked with underserved communities but didn't apply to PRIME. No one questioned their intentions. I also don't think schools will question why you didn't apply to PRIME because PRIME isn't just for serving the underserved, it's a dual degree program and a simple 'I don't want to get a second degree' is a legit argument against PRIME. One of my friends (URM, disadvantaged) didn't want to be saddled with more school and debt and chose not to do it.