it seems likely to me that more often the known long-term injuries are just overshadowed by the real but short term benefits that the vice, whatever the flavor, really does provide.

There's a line in a song that goes "Everybody's talking about my drinking, but they don't say nothing about my thirst."

Go checkup. Choose checkup. I want you around for the long run, and I'm too aware of the ways your body can turn on you. Any doctor who makes you feel bad about your weight is an asshat, and his or her opinion is irrelevant. At least get a pap smear.