Most apps that are in need of notification control either:
a) bundle everything in one category, from critical notifications without which the app can't fulfill its purpose to "HEY YOU HAVEN'T USED ME IN A DAY, USE ME NOW" spam
b) create a new category for spam every time they feel enough users have turned off the previous one, which is often
I wish app review checked for this. It's hostile anti user behavior.
Companies do it with email unsubscribe categories to, which is skirting laws for sure.