I agree with the above. I have spoken with at least one person on an ad-com who felt VERY strongly about people being general dentists. He said when I interview the person to get into my school, I want to know that they want to be a dentist, not an orthodontist, etc. He wants people that go to his dental school to come out and be incredible dentists, not go on and specialize.
As far as your own practice goes, I can't imagine anyone on a committee having negative feelings towards that. Just don't say something like you won't treat medicaid people, or you will only work on people who make six figures. Obvious stuff like that. We are going to have to pay back student loans somehow, right?