There are so many transphobic premises from your whiny diatribe that it is hard to know where to start.
First, it is not cheating because the rules allow it. It is also not deception. The coaches know. The clubs know. The teammates know. The leagues know. In fact, everyone knew in Lia Thomas' case, giving all of you transphobic whiners the identity of the person to direct your death threats and hate mail. With trans youth, however, sometimes the opposing players don't know, or their shitbag transphobic parents, but that mere fact pretty clearly destroys your sad and pathetic assertion that trans participation results in an "unfair" advantage. But, as the Lia THomas situation shows, it is also important to not broadcast their status to the opposing team's transphobic daddies like you because we know people like you will harass and send death threats to children who deserve better.
How do you miss 5' 9" to 6' 1" (Height varies according to source)
Wingspan (Approx Arm Length) 74"
Average Womans (Approx Arm) 69"
That is an advantage of 5" to the touch pad, just that.
It holds true in whatever sport you compare.
In fact, we know your kind will harass and send death threats to people you apparently concede deserve empathy due to the difficult lives they have lived. In fact, we all know about the one crazy guy at this site who tried to out an 11 year old girl who believed was trans, and humiliate her publicly at both the tournament and in this thread. In other words, there are important privacy interests that support ECNL and CIF policy of limiting disclosure to only those who have a need to know, and not broadcasting it to shitbag dads like you, many of whom will threaten to kill children. Perhaps the most important point to be gleaned from not telling the opposing team's transphobic daddies, however, is that if you can't identify a trans player on the field - and no one here has - it is a joke to claim that they have an "unfair" advantage. You and your friends just call their participation cheating" because you hate trans children and aren't getting your way.
Your assumption that being trans is a "mental health problem" and the result of abuse and poor parenting is also incredibly transphobic. Regardless, your lack of empathy is, well, not surprising.
Nor is your complete lack of logic skills. Your assertion that identifying as black would allow you to start a minority business and "profit massively" is also blatantly racist, but I will focus on it being a terrible example. The reason it is a terrible example is because you would actually be cheating and deceiving people, whereas the trans players are actually following the rules. If a government entity allowed participation as an MBE to those who merely "identify" as black, you disclosed that you were merely "identifying" as black, and you were then allowed to participate, that would be an equivalent comparison. But they do not for obvious reasons, which are the same obvious reasons that the NCAA, the IOC and women's professional sports leagues make it so difficult, and impossible in most circumstances, for a trans woman to participate.
What is nuts about your "comparison", however, is that you are ignoring the much better comparison with arguments being made by your transphobic friends. They claim that trans participation in youth sports should be barred because transphobic people "might" abuse it by pretending to be trans so they can win trophies. This is about as stupid as saying that we should get rid of MBE programs because racists might similarly abuse the process by pretending to be black so they can win government grants. Now do you understand how freakin' stupid and ridiculous your bs arguments are?
Ultimately, the argument against trans participation in youth sports always boils down to "I hate trans people and will make whatever excuse it takes to rationalize it."