Quantity versus Quality - A Wise Doctor

I recently picked a new primary care doctor.  After two visits and exhaustive lab tests, he said I was doing 'fairly well' for my age (I just turned 60).  A little concerned about that comment, I couldn't resist asking him, "Do you think I'll live to be 80?"

He asked, "Do you smoke tobacco, or drink beer or wine?"  "Oh no," I replied "and I'm not doing drugs, either!"

Then he asked, "Do you eat rib-eye steaks and barbecued ribs?"  I said, "Not much... my former doctor said that all red meat is very unhealthy!"

"Do you spend a lot of time in the sun, like playing golf, sailing, hiking, or bicycling?"  "No, I don't," I said.

He asked, "Do you gamble, hunt, drive fast cars, or have a lot of sex?"  "Nope," I said.

He looked at me and said, "Then, why the hell would you even care?"