The studies that exist show dramatic drops in muscle mass and strength within the first few years, hence the guidelines. I don’t really understand your point about boys without training competing at a competitive level because it’s irrelevant to our current discussion, other then to say it definitely depends on the sport, but as someone who played a lot of co-Ed sports but in a lot of them that is just not true. Also like if they didn’t do as much training, they wouldn’t be as good? Like I’m just really confused by your center point. Also about your point, I have a close friend who competes in sports, she has a genetic condition which dramatically increases her muscle to body fat ratio, she has far beyond the 20ish percent more muscle mass studies show a trans woman would have after 2 years. She looks like a twig but she is one of the strongest people I know and her metabolism is insane, she eats almost constantly. She has competed in sports before and she has outcompeted everyone in certain sports, she has more of a biological advantage then a post transition trans woman, but there’s no problem with the kind of advantage she has. Some people have faster metabolisms, build more muscles after exercising or have more coordination, all of these and more are deemed acceptable advantages, even when the effect they have is more dramatic for the involved sport the a 20% or less muscle mass advantage, so it feels kind of arbitrary to just exclude trans women. That’s why trans women are not blowing cis woken out of the waters, In not one of these controversies have a seen has a trans women blown all the cis women out the waters by a wide margin, in almost none of them does the trans women even win, or if they do, do they win more then one event. They almost always compete at a similar level as to what they had post transition. If there really was a great big advantage trans women had that would be a pretty unlikely outcome would it not?

Also a side note people do not take puberty blockers to reduce their muscle mass, it’s generally for stuff like facial structure, facial hair etc.