My autistic cousin (high school age) also thought she was transgender for a while. Then she sat with it, thought it through, and now knows she isn't. She also thought she might be a lesbian for a while, too - are we going to remove LGB education from schools as well?
Teenagers figure things out. As above, it's really not all that different from when schools introduced more and more LGB education and suddenly classes were full of kids figuring out their sexuality. I went to high school in the 2000s with lots of people who spent time wondering if they were gay and lo and behold, most are straight, some aren't. Not long before my time, schools teaching kids about gay people was seen as insidious and evil.
We should be teaching kids about real world issues and that other people unlike themselves exist. Do certain institutions take things too far, and make headlines that rile people up? Absolutely. But school isn't just about teaching kids algebra and making them read Of Mice & Men. It's about broadening their horizons to a world they're unfamiliar with.