We-e-e-e-lll ... that whole line of reasoning always ticks me off, because it's such a false portrayal of life, that a few unfit people use to justify their choices, and ridicule people who try to take care of ourselves.
If you've seen the kind of musculoskeletal pain that people who DON'T exercise typically suffer when their muscles and tendons contract from non-use, bursitis sets in, degenerative arthritis affects multiple joints, etc., etc. you'd never for a moment choose those over either the temporary pain of acute orthopedic injuries, or the lasting pain of post-traumatic arthritis in a few joints. And that's not even talking about their greater risk of all kinds of painful and extremely debilitating diseases.
It's no different from dietary choices. If someone has never in their life felt physically good, they really have no idea how bad they feel, or that they have any control over the matter. And it's easy for them to ridicule those of us who are acutely aware of when we feel a little bit (or a lot!) bad and put some effort into trying to remedy it.
Speed comes from what you put behind you. - Judi Ketteler