I wasn't a tomboy when I was a kid, but I was shy and I was never girly. I was a bit careless with my appearance, unlike my sister who was very much into dresses, boys, and expensive accesories. Obviously, my mother thought there was something wrong with me. Her solution? Sending me to the school psychologist because she thought I was a lesbian. Thing is, I was insecure about my looks and I thought that me dressing in a more girly style would make me feel ridiculous. I eventually overcame that.
That was in the late 80s. Now I have my own kids, I can see that parents aren't remotely like this. There is more freedom to be yourself, whether you're a girl or a boy. In the earliest 00's, boys played with dolls and girls played with trucks and nobody minded: it wasn't something negative as in "omg, he's gonna be gay!" nor people talked about transgenderism. It was just young kids exploring. Most just moved on from it and did activities more "proper" to their gender eventually.
Someone mentioned in another thread that these people have a need to feel they're making changes. Their identities ain't even to be "queer" but to be queer so everybody accept that. Their identities are the activism just by existing. Just like we make fun of people who do stupid shit to "trigger the libs", their whole existence has the only purpose to "trigger the conservatards". the notion that people were already accepting of what they are is a denial of their own existence.