I don't think those things should be pressed on developing minors either. But I see people of all stripes dressing their boys in pants and their girls in skirts; blue for boys, pink for girls; encouraging boys to hang with boys and play with "boy things" and girls to hang with girls and play with "girl things" and romanticizing cross-gender interactions between children as young as a day old. I don't think we should be forcing these norms on children of this age.
But I suspect that what you're actually saying is that we should not tolerate transgender expression in children. Which, I submit, violates the rights of that child to express themselves.
And, by the way, freedom of speech includes the freedom to respond to deplorable speech with criticism and even shunning. If somebody thinks that you're a bigot or a hater, will you defend their rights to say so?