You may consider this to be a reductio ad absurdum, but I am happy to bite the bullet on this one. Making sure that athletic awards are awarded solely in terms of “grit or drive“ is precisely the point of all of this. that’s why we have weight classes in wrestling, and why we divided men’s from women’s sports in the first place. whenever we give credit or blame to anyone for anything, we are presupposing that what they did was some kind of achievement i.e. we are presupposing the existence of something like free will, and that what they did resulted from freely chosen actions maintained by the force of their free will. we will never be able to have a system where prizes are totally a result of the achievements of the winner. But we also can never draw a perfectly straight line, and that doesn’t stop us from trying to draw the straightest line possible when we are designing a building, bridge, etc. The rules for designating teams in Murderball are almost as complicated as the rules you described above, and given the different impact of different handicaps, that is the only fair way to do it. Dividing sports by sex was an attempt at making sports competitions fair, and it was a step in the right direction. But now that we also have to deal with the issue of trans rights, we are going to need a more complicated system to keep things fair for both trans women and cis women.