Thing is with iOS notifications as they are, if you ignore them the system suggests you to revoke the notification permissions so it's not really an issue
I am not exactly sure what you are saying as I don't have an iOS either, but I was talking about their phones that are Android.
Anyway, a mere suggestion to turn notifications off will be likely as ignored as the spammy notifications themselves. That are a lot of assumptions that people used to phone technology make about what is logical, easy, intuitive or obvious that do not hold for people who lived for 50 years before mobile phones existed
