If your body's already has been bathed in male hormones for 15 years, your advantage is locked in even after you have your pee pee removed.

You just pivoted. First you were talking about "hanging out", and now you're talking about advantages due to hormones. Two different issues.

The former is easily addressed. The latter should probably be addressed, but it isn't exactly a number one priority given that it affects less than 1% of the population. I think sporting organizations should figure it out. There is nothing (to my knowledge) about weight classes in federal statutes. The boxing associations figured it out for themselves, and apparently it works for them.

It's not that I don't have sympathy for them. But it seems like it's being used as a foot in the door for the larger issue of DEI, trans rights, etc. That I can't agree with. Yes, it should be addressed. I also think some allowance should be made for persons who matured under one set of hormones (e.g. males that subsequently trans-ed to female). Sporting organizations can, and do, create different categories for competitors. I don't necessarily know the correct resolution.

That's no excuse to forbid a trans person from using a bathroom based on their current plumbing.