You, along with several others, are missing
Andrew-Ryan 's point:
He is not arguing that teaching children to celebrate diversity is bad, he is arguing that it is in no way giving children a free choice, because it is still a form of indoctrination.
And he's totally right. We indoctrinate children. That's what we do, that's what we've always done, as a part of creating and maintaining our society.
Indoctrinating children to be close-minded, bigoted, lying sociopaths is bad. We shouldn't do that, and we should stop people who are trying to do that.
Indoctrinating children to be open-minded, accepting, honest and empathetic is good! We should encourage that in any way possible. But it's still indoctrination, and that shouldn't be shied away from.
(Never thought I'd be defending Andrew Ryan, so thanks for that).
People are exhausting.