I find this controversy to be something that reflects the cable news/tabloid idiocy of our time. Christine Jorgenson became the first known transgendered women when she started surgical procedures in 1952.
I am unaware of any impact transgendered athletes had on the world of sports until the mid 1970's when Renee Richards tried to play professional tennis. In Richards previous male life, she had been a college tennis player and was then a very good amateur player before undergoing a sex change. She won a lawsuit to try to qualify for the U.S. Open but she did not progress very far and retired.
As far as I know Richards and now Thomas are the only athletes who have trans gendered and enjoyed any competitive success at a national level since 1952. While I understand the issues of competitive equity and opportunity it seems to me that someone coming along every 35 years or so is not a reason to create an uproar.
However, and I have not seen this widely reported on the mainstream media, steps have already been taken to prevent future Lia Thomas's to win championships. The NCAA basically told USA Swimming they would follow their rules on how to determine if someone can swim in woman's events. Rules had already existed that prevented humans who had too high a testosterone level from swimming as a woman. USA Swimming changed the rule to say someone had to have tested below the maximum levels for a period of 36 months. If this rule had been applied to Thomas she would have been ineligible to compete at this time. But the NCAA decided to only apply the rule only going forward.
Thomas's times have declined now that she swims as a female. As her testosterone levels continues to decline her times probably will also.
This appears to me to be a reasonable compromise and a wise decision. I also think that USA swimming and the NCAA made a wise decision to couch this in medical terms and not get involved in the culture wars.
In my experience the NCAA making a wise decision happens with less frequency than a transgender athlete winning a championship but I believe in giving credit where credit is due.