What if some people that would usually be in the group that enjoy playing table tennis realize they actually want to run a marathon and they find out that most

What if some people that would usually be in the group that enjoy playing table tennis realize they actually want to run a marathon and they find out that most marathon gear is only built to help group A run better? What if there were shops that sold marathon gear but there is limited supply and since 9 out of 10 customers are group A people then those few group B that would like to buy the gear cannot because it's always sold out? What if I specifically started selling gear saying that 50% of it was reserved for group B to help them participate in marathon and that I cannot sell it to group A people? That's clearly discrimination, isn't it? And yet... The problem is that there's so many variables in this equation that it can't simply be resolved in a simple "racism bad" or "discrimination bad" and "if they really wanted to they could but in reality they don't want to". It's a bit more complicated than that.