Men should not be in women's sport end of! Saying he is 'weedy' etc is meaningless, a weedy man (that is performing at a high end sport) is often still stronger, faster etc than the stronger women. My DH was still stronger than me even when I weight trained, when exercising I could lift heavier weights as I had trained specifically for that but for normal every day things he was still stronger than me. There are many basic advantages, everyone knows this so it is infuriating people are still trying to deny this to give yet more advantages to men.
This is what Serena Williams said about tennis - “If I were to play Andy Murray, I would lose 6-0, 6-0 in five to six minutes, maybe 10 minutes. No, it’s true. It’s a completely different sport. The men are a lot faster and they serve harder, they hit harder, it’s just a different game".
I am waiting for men to start cropping up in women's pro tennis on the main circuits, maybe Tim Henman missed a trick there, guaranteed no 1 in the world as a woman no doubt.
I have always felt that everyone should be accepting of transmen/women in every day life, there is no reason to not be IMO, I know a few men who are now identifying as women, more than happy to give them their preferred pronouns, everyone is extremely accepting in their circle of friends, however I will never accept men in female sports/prisons/private spaces. I am yet to see a good argument for this.