@lukeshu @mjg59 @lxo as someone who competes in and organise competitive sporting events, I would say safety isn't the main driving force. The problem is the idea of "fairness", and the cultural perception of sex and gender as binary and fully discrete. We established M/F categories on the grounds that the athletic performance of people labelled "women" was substantially lower than that of those labelled "men", and that putting them together would largely remove any chance of women winning.