rationalskepticism.org

Thommo wrote:
Taken loosely, sure I'll agree. But the thing I value might not be "me" it might be "being healthy".

umm, how can "being healthy" NOT be about "the person doing the exercise". You may have a logical construct that allows this.
If so, would be interested to hear it.

Thommo wrote:
Right, but what if they value other activities more than keeping fit?

Then they do not truly value themselves. If you exercise then you know that light exercise is effectively free and the time needed is minimal.
https://www.diabetes.org.uk/professionals/position-statements-reports/statistics

Thommo wrote:
There are also plenty of disabled people who cannot do it, and whose self-worth, quite rightly, isn't invested in their physical capabilities.

Obviously true.