I don't know about your first point, but definitely all the rest apply to me. I don't look like a body builder, but I definitely feel and look more solid at 43.
Basically for the cost of a few hours a week you can +1 or +2 you strength and consitution scores.
I also notice calming and de-stressing effects from working out as well. I work long hours normally but I would still much rather go to the gym and workout then go home and lie on the couch, as I'd go insane at the lab if I didn't.
Basically for the cost of a few hours a week you can +1 or +2 you strength and consitution scores.