Wait a minute, are you saying that women (not trans gender women) who are bigger and stronger than other women shouldn't be allowed to play sports with the smaller and weaker ones?
I don't know why people do this? "Are you saying something that you didn't say?" Respond to what is said, not what is not said, or what you think they probably would have said.
But.....lets' be fair on this, and answer a closely related question.
Should people who are very large be allowed to compete against people who are very small, in sports where a difference is size, strength, or momentum could result in injury to the small player?
The answer is that no, such competitions ought not be allowed. That's one of the reasons there are weight classes in boxing.
Now please don't do the stupid thing that people so often do, and respond with any variation of , "Meadmaker thinks....." followed by something that Meadmaker didn't say, and probably wouldn't agree with.
In actual practice, I'm fairly confident that people who organize rugby competitions have a way of dealing with the situation of a 5 foot, 100 pound fellow showing up and wanting to play. I'm confident they have some means of managing it, or any similar situation, in both men's and women's leagues. If there is an obvious safety hazard, they'll fix it somehow.
What happens in contact sports where transwomen are allowed, though, is that someone who is way outside of the norms, or even the extremes, of women's weight and momentum, and demands the right to play is allowed to, despite their masculine appearance, and masculine size, and masculine speed, and the fact that the doctor who performed the pre-participation physical assigned them male, based solely on the existence of functioning testicles dangling from their 220 pound, lean, frame.
Fortunately, I know that in some sports leagues at least, common sense has prevailed, and they have said no to transwomen competing where they could pose a danger.