I really don't think that's true. What we've gone through ourselves or witnessed in a son and/or daughter carries immeasurable weight.
Hearing from JfH (so far the only serious answer I think) is profound. That's firsthand stuff, not scuttlebutt. I know that we all get off on the #legendofKiko, but, this is different. He'll be on his own (within his own mind) during this time. He won't be able to do what he seems to truly enjoy. Knowing that others here have gone through the same process is helpful to us as a community.
Hopefully others will share whether it's rehab from football or dance or baseball it all counts (soccer too). Football players are performers & anyone with firsthand experience in the trials that a performer goes through will have good info to share.
PS Personally I don't have anything to offer here. I had a total knee reconstruction when I was 16, but they used leeches on me.
My kids have battled through broken noses, Achilles injuries and a couple broken wrists. I can offer some wisdom based on that, but I don't think it compares to what others can offer.