This is a thoughtful statement. Its also btw why I suggested that solo sports need to be held to a higher standard than team sports.I know it isn't fair to compare an elite collegiate swimmer (more elite in one gender than the other) to youth soccer leagues. Again, this is a circular argument being made in a make believe world - nothing has really happened yet in regards to soccer..it may never happen. has happened in HS track though, and see the ruckus it caused. It's an emotional argument not really based in science/biology, rather in today's society..Nothing wrong with that by the way.
And to kinda answer your question, in this make believe world: If a pre-teen child undergoes treatment, then fine, as long as the field is level. IF a post pubescent transgirl, without any type of treatment and who is progressing on a normal curve at age 16 gets on a field with girls...then no...not a level playing field.
I wonder how many kids/parents go through the trials and tribulations of pre pubescent treatment for a trans child. It's not an easy environment to manage...usually sports are the last things on their mind.
my only objection to your reasoning is that there is no such thing as a level playing field. There never is in sports. It’s an illusion. It’s certainly not a level playing field for the 14 year old girl that just happens to be not as great of a runner, despite training as much as her team captain. Even more so if said team captain is xxy genetically or has a high testosterone count. It’s not a level playing field for the 12 year old 5ft boy getting bounced off the ball by the 6ft early bloomer. It’s not a level playing field for a December birthday being forced to compete with a January birthday. And it’s certainly not a level playing field for the player who has to compete with the teenager that’s doping (I guess that means we put you down as someone who supports drug testing youth soccer athletes)
sometimes the closest we can get is “close enough” particularly when the results don’t really matter all that much (as say in Youth v academy or college soccer). Putting the mtf in the boys league also isn’t a level playing field for the mtf (whether they are on hormones or not since they’ll most likely not want to build body mass in order to blend in). Someone is always going to get screwed.