A delivery update matters. A reminder to browse usually does not.
Many apps ask for notifications before there is any reason to trust them with that attention. Later, useful alerts sit beside sale announcements, daily reminders, and messages about features nobody requested. Turning everything off creates a different problem when an important update gets missed. Which alerts actually earn a place on your lock screen? Sorting by purpose seems more useful than deciding that an entire app is good or bad. There may be a way to keep delivery changes, payment warnings, and real messages while letting the rest stay quietly inside the app.