I think you are making a kind of non argument just to say, that whatever conclusion a democratic decision is coming to and not aligned with your opinion would be fabricated through illegit bribary, intransparent decisionmaking or so.

I think we have to acknowledge, that it is high effort to get many people involved and include their vote. So I would assume to have a plausible but still practicle democratic process, free speech has to be protected on all levels, so unpopular opinions can still be expressed.

But we also have to accept, that children have rights themselfs. So even when there are very conservatif places, where being queer is not greatly accepted, it still makes part of the individual right to express yourself.

Also children have this right to put costumes, that their parents do not like. And I do not talk about lascive whatever. I talk about a girl dressing in guys cloth or a boy dressing in girls cloth. This is also part of free expression. And no majority has the right to violate an individual to not express yourself in whatever way you want, that does not violate others freedoms.

Therefore it is very important that children get various perspectives and find their preferences. I am not saying that one should give sexual content for children. I am saying we should support children in getting new experiences and try new stuff. They will find out what works for them, whev they get the opportunity to try.