I really don't see what's difficult to understand. The Anglican Church is a 'soft church'. It's survival hinges upon how progressive and inclusive it is whilst trying to adhere to traditional 'christian values' it's a church of everything for everyone.
The old notion of inclusivity, which existed just a decade ago where you agree to this code of such and such and then you'll be accepted is out.
The inclusivity of no hurt feelings from people with influence who scream and shout loudly in now in effect.
This is where the majority of institutions are in 2023. But unlike some of the rest the Anglican church comes under huge criticism if it takes a more conservative stand.
I wouldn't want his job. Anglicans in more conservative countries are annoyed and some want to separate and meanwhile he's under constant pressure to be yet more progressive and under fire if he doesn't. He understands the stakes.
Now if government would legislate that sex matters unequivocally it would help. A strong defender of the faith like the Queen was will help.
A labour government will bring more heat. As I said I do sympathise. I don't expect support from Welby I'm afraid.