> humans, on average, are healthier and live longer than ever in human history.

Kinda. We also have incredible rates of cardiovascular disease, obesity, and diabetes.

While I do mostly buy that the mind and the body are connected, I don't think being able to bench press 250lbs is a necessary, fundamentally human capability. I do think being able to think is. Literally Rene Descartes cogito ergo sum. If we lose cognition, executive function, analysis, skepticism, etc., I don't think we're human anymore.