Same reason my doctor, only my medical history form, asks me if I own guns and if I keep them locked up. The entire medical profession has gone away from healing and are a bunch of political hacks. There are some exceptions (individual doctors), but the medical community as a whole is obsessed with politics. The only things they see fit to do "medically" seem to be knowing when it's okay to kill someone (babies in-utero, disabled babies, disabled adults, old people, etc). No surprise they're spending all their time trying to disarm the public as well.
Heh. My cardiologist used to act that way ... until 9/11, after which he asked me what he should get (Mossberg 590, of course...).