I agree about the old guys being way more tough about playing through injuries.
But Patrick Mahomes played through a bad high ankle sprain last year in the playoffs- there are a very few -not many though - that still want to stay on the
field.
I met a former player for the Baltimore Colts. Offensive lineman in the late 60’s to the early 70’s. His fingers pointed every direction of the sun and his knees were shot. I asked him if he would do it again knowing what would happen to him. He smiled with half his teeth gone and told me “HELL YES”.