Yes, it's a failure of central government. In KCSIE it specifies safeguarding has primacy over GDPR. I.e. you can breach GDPR if needed for safeguarding a child.
We need something similar regarding EA 2010 as children ARE NOT MINI ADULTS! If they were they wouldn't be in school but out working, like in Victorian England!
(sorry, bit fed up about this).
What I will say is that parents have power, and for many schools (not all) it does not need to be combative. I'm a governor as well as a parent and my older child's school had a couple of trans activist teachers the first year. Teachers are stretched at all times, working long hours with insufficient resources and expected - increasingly - to pick up what should be social services work. To feed children who are hungry because their parents can't afford food. It's bloody hard being a teacher in a state school and activists can quite easily sneak things in without other overstretched staff noticing. In my DDs school, this had a very quick course correction once the HT was aware of what had happened via parents point it out.
In my experience MOST teachers really do want the best for children, they would be doing an easier job if they didn't. Unfortunately activist teachers have been able to run amok partly because schools are stretched and in the absence of a clear steer from government.
I do think it would be ideal to have a few high profile sackings of teachers who have breached safeguarding spectacularly, and government guidance needs to be statutory.
And the captured parts of the DBS service also need sacking - at the moment teachers will be scared not to capitulate for fear of getting DBS barred as Kevin Lister was.