Got a few thoughts at least on the OP (have not read the 11 pages of threads, but skimmed a few, and think I get the general drift):
First, if I had a daughter that was a top athlete and she got beat out by a transgender woman who had recently been a man, I would be pissed. Don't think any parent would feel otherwise.
Second, I know a handful of trans individuals, one I have been around almost since he was born. TBH, he had a lot of social problems when he was a girl, and since he transitioned into a male, as an adult, he still seems to have a lot of problems, can't hold down a job that requires stress, needs a lot of help from his family, etc. Now, does he have a mental illness? Can't say, not a professional, but from my perspective, he is not living his best life, or at least not a very productive one.
Third, this whole issue maybe affects .00001% of the population. And to the extent it really is a problem, I am confident that the LPGA, the womens' tennis tour, the IOC, NCAA and other women's sports organizations can decide for themselves how to run their sports, they surely have more at stake and know more about the issues than I do.
Fourth, this whole issue is yet one more example of fake outrage being orchestrated by certain groups for political purposes. I find it VERY hard to believe there is any measurable group of men willing to take massive hormones and undergo life altering surgery so they can finish 4th at the NCAA swim meet or win a two bit tennis or golf tournament. My own brother was going on and on about this at one point, and I stopped him: Neither of his kids even played high school sports, and I know he does not follow HS or college track and field or swimming. I bet neither he or almost no one on this board could tell me three individuals who finished in the top 3 at any NCAA swim meet, other than Mark Spitz and Michael Phelps. So what is he so upset about??
I did see a story last year (I think) about a trans kid in Kentucky who wanted to run on the girls track team. Of course, it became controversial, and the powers that be decided to ban the kid from running. At a middle school? Come on, no one outside of parents and friends even knows the sport exists. Just let the kid run, it gives them something to do and maybe helps their mental health, as well as physical.
Finally, and OT a bit, I am always amazed at posters who will post their same opinion on the same thread over and over and over and over and over again. Maybe that explains why threads like these go on for 11 pages or more. And why this site is not nearly as enjoyable as it used to be.