There are two main obstacle. One is money. Presumably on the college level this can be fixed easily enough by taking scholarship and funding from the girls and boys programs.
The second is numbers, even if you throw in the FTMs (who have long been underserved) and the nonbinary who want to play in the male-restricted league. For the youth level it's not a practical solution unless you are going to adopt a "busing for all" policy because high schools and below, or club teams, simply don't have enough of them in a sport to make it competitive, particularly if you are talking teams (there might be sufficient for a state championship in a large state like California for individual sports). On the college level, you probably could do something in the individual sports, since we are able to do it for disabilities. On the national and pro level, it becomes easier to aggregate. Conversely, however, when it comes to team sports the impact of one athlete is minimal...the sole exceptions maybe aggregate individual sports (e.g., swim and track teams) and basketball (which is simply just a hard case).
67 pages in we've covered the rest of your post. It's not as simple as saying men are men, women are women: biologically they are literally the brain of the opposite sex trapped in the opposite body...it's a physical condition not a life style choice. No one is changing just so they can get a competitive advantage and win. Yes, men have a physical advantage over women, bell curve to bell curve, but the question is can steps be taken in MTF to mitigate the advantage. It, unlike your post, is complicated.
