When was people being born trans debunked? I have never heard of that.
using detransitioners as an argument against trans people is just blatantly ignoring reality, the reality being that only around 4-1% of people who transition go back and the very large majority of those are because they wanted to wait until they have more support to transition or being nonbinary. (it is also worthy to note that the numbers I know for the total amount of people who detransitioned is outdated and the real number is probably much lower)
how is a little girl wearing animal ears comparable in the slightest? She is literally just wearing what she likes.
I like how you didn't even say that they changed their pronouns from what they were before, you just said that they were stating what their pronouns were, which is about as mundane and insignificant as you get.
and even if they did change them completely it is still not a very big decision, it's just them trying out what is best for then. and if they didn't like it, they could just go back, which according to you, they did.
And the "this child had an abusive parent who pushed the trans on them and tried to make them trans so they could brag about it" story just feels like there are so many details missing, like what the mother did, or how they got out, since how you described the story being "this mother let their child know that they will love them no matter what tehir gender choices are and the child thought that was abusive since they watched 2 pragerU videos when they were 8 and left their mother on their 18th birthday with out explanation" is just as likely as it being "the mopther chased her with a cross with the trans flag on it and beat her with it while chanting "make mommy proud, become a boy"". and you folk have a tendency to lie and make strawmen to argue against so I have to take everything with a grain of salt.