The bolded reply is wonderfully worded. Self-identify is prominent throughout life, connections beginning before pupils even enter school. At the heart of it, there are pupils that have two mothers, or two fathers, waiting to pick them up in the yard and their peers must be aware that this is acceptable and this is conventional. Transgender people should be able to collect their children without fear of discrimination or intolerance. That’s why the curriculum is dictating, quite rightly, that pupils are taught about this. They’re not being taught what to be, they’re being taught to be tolerant, understanding and aware.
As for your final paragraph, you’re correct in mentioning biology, food chains, climate change and sustainability. All of this is taught within primary schools in the UK. Brexit, too. I have had some fantastic questions about Brexit, particularly from pupils with that kind of worldliness. I’ve been able to answer them objectively, as have others.
Honestly, some of this lot in here are most guilty of underestimating children. They can deal with a lot more than many might think.