From this Woman's Hour clip:
www.bbc.co.uk/sounds/play/p06tmhr3
The first interviewee is arguing that initially transwomen (ie males who identify as being women) should compete in women's sport (which is already happening) but that ultimately single-sex sports should be abolished and sport should become gender neutral. This would mean all men competing against women (if any women qualify) and sports teams not just being mixed sex but not taking into account sex differences (e.g. at the moment a mixed-sex sports team normally has to have 50% women playing but in 'gender neutral' sports, the strongest players would be selected, irrespective of their sex.)
The argument put forward is that women only perform at a lower level than men in sport because we psychologically cap our performance and don't try as hard as men.
AIBU to think that this is a load of old b and will result in women missing out on the opportunity to play fair, competitive sport? Women in sports, particularly at the top level, work their a off and display incredible determination and skill - but they cannot outpower men.
Men have longer limbs, greater lung capacity, bigger muscles and a different shaped pelvis (shaped for efficient movement rather than childbirth) to name but a few differences. I play sports and, when I've played (socially) against men the sheer power can be overwhelming even when they are technically a less skilled player.
Surely, it is obvious that refusing to acknowledge physical sex differences, far from being open-minded and progressive, is massively detrimental to women?