Many apps make this impractical by not separating the notifications into separate categories, so you either have to accept the spam, or break functionality that spans from convenient (credit card payment notifications) to critical (2FA push prompts that may only be accessible from the notification).
> If only one single app does it, it shouldn't cause a problem for anyone.
> Many apps make this impractical by not separating the notifications into separate categories
I can't say I share your experience. There are apps that spam you with notifications and intentionally don't use categories but I generally just uninstall those.
> If only one single app does it, it shouldn't cause a problem for anyone.
And that's how every app justifies doing it...