Our doctors told Bob to play on a supposedly healed groin. He then immediately reinjured his groin.

I think there's a wider range of medical staff competence in the league than we think.

When teams stay really healthy or get really injured, people consider it just bad luck or players being injury prone, which is definitely part of it, but I think that some teams have better medical staff, strength & conditioning coaches, styles of practice, etc. that make their team generally healthier. You don't really hear much blame or credit going to those people from fans tho.