If they are trying to protect women from "men" in sports shouldn't they prevent "women" playing with men? One would think they would be at the same risk...
See, the problem here is that you're approaching this as a rational skeptic, instead of someone who takes their marching orders from a christofacist subsect of their voters (Take Back Alberta / TBA), and doesn't care about hurting anyone that isn't white and wealthy.
If you want to be impartial, don't use two different words for the two different groups. You know exactly the difference between protect and prevent. I'm not even defending the law, I'm just explaining why it's a one-sided issue