Now you are changing it to an incidence/prevalence issue.

So, you are saying that this coach shouldn't take a precaution against is players having a sickle cell crisis, despite the fact that you don't know what the incidence of sickle cell crisis is from players with traits, nor do you know if these players have had a crisis before, nor do you know if the coach has had to deal with the crisis before, nor do you know if coaches in general take precautions against a sickle cell crisis.

Makes sense. Stop trying to dig up these anti-byu conspiracies with opposing coaches trying to lay the groundwork for excusing a loss. It's ridiculous and you sound extremely petty.