Gender dysphoria in children exists. Doctors and scientists who went to school to learn how to study this kind of thing agree that it exists. You do not understand it. That is fine, that is fine. You do not have to.
Do you think they do gender reassignment surgeries on children? That's conservative fear mongering. The only treatments for kids are social transitioning and, eventually, puberty blockers. Puberty blockers keep the body from undergoing any permanent changes so they can figure out what they want to do. Stop the blockers and they have the puberty their in-built organs pump out. Start HRT and they have the other puberty.
What if a child assigned female at birth asks to be called "he" for six months and then changes her mind? So what? They were allowed to explore the option. Childhood should be a time when kids are not afraid to experiment and when their parents and family support them. For example, in many households, a little boy asking to be a princess for Halloween will get them beaten, punished. They don't have the freedom to find out if it's "just a phase" (which is such a dogwhistle).
In an ideal world, even if it is just temporary, they still get to try it out. No harm done.
:EA DATA. SF: