Even at
200 pounds (forty pounds overweight) I look
thin compared to the average person on the street
I see these days.

This is sadly true. At 260, which is clinacly obese, I realized that I was
still thinner than half the people around. Still worse, most of those people
were not active in the least. No muscle beneath the fat. They were dying and
didn't know it.
The real trick to health isn't about being fat or thin, it's about being
active. A sedentery thin person is also in danger.

RB