Call me crazy, but as a society, what do we lose if our best athletes are less good than the ones we have now? This argument maybe makes sense in STEM fields but to me at least it falls flat on its face if the loss is some number of seconds off the fastest mile ran, or cm's off the highest vertical leap.
It depends on whether you think non-STEM endeavors like athletic performance or art enriches society.
Does michael jordan dunking from the free throw line enrich society? Does mozart's music enrich society?
Did Bolt or Phelps breaking records at the olympics affect society or humanity? I'd say yes. Beyond the inspirational and the aspirational, it also pushed humans limits further.
Does art ( physical, musical, literary, etc ) matter? I'd say it matters, maybe even more than "STEM". But that's an open-ended philosophical discussion.
Athletic endeavors also help advance science as well. There is a science of athletics/athleticism. Striving for athletic excellence could drive genetic, biological and technological advancement and vice versa.
I think you missed the nuance of my point. I wasn't saying we should get rid of sports or athleticism or creative en devours that result in entertainment value or inspire emotion. I was saying that the accomplishments in those fields are relative. If Michael Jordan had instead dunked from a foot closer, but that was still better than had been previously seen, would the world have derived less enjoyment? If Phelps or Bolt had broken slightly less impressive records than they had broken would that really matter at all? I'd argue that since the history of humanity has been breaking those records and moving the line forwards again and again and the people where entertained long before the folks you mentioned were born, the answer is pretty obviously "not really". But a medical breakthrough that impacts millions of lives, not abstractly but in measurable improvements to health and longevity? It's a whole different kind of thing. Reducing the cost of clean energy and pushing back the grasp of climate change? Stuff like that vs an impressive slam dunk and I just don't see why it's vitally important to ever force-feed a child a sport in the hopes that they'll break that kind of record.