First of all:
> you demand that when sex category is established, then no safety concern must ever present for any reason ever, even theoretically.
No, I merely point out that the "sex category" is unnecessary if we're talking safety and fairness.
You mentioned three specific things – muscle mass, muscle strength, bone density – as the basis of why men and women need to participate separately for safety reasons. So I am using these. Any others that we need to consider?