I know this was a joke, but I can't really understand the worldview that says people should accept physical decline in a passive way. The fact is, we actually have a lot of control over how quickly and how well we age. Just using sunscreen can prevent a lot of the age-related loss of skin structure. And interventions like topical retinoids or collagen induction (e.g. microneedling) can even restore some thickness and elasticity that have already been lost. This also goes for fitness, joint health, and a lot of other things. Caring for your body is actually well aligned with the goals of psychotherapy.