That's fine for some people, and I support your right to configure your phone the way you want to. If you want more battery life and are okay with delayed notifications, then this feature is for you. Good for you.
It's unfortunate you don't believe other people have the same right to have control over their devices. That's why you are morally in the wrong. Now sit down.
For the record, I monitor systems like fire suppression for data centers and hospitals, respond to calls from cancer treatment centers for patient-impacting issues, and I do financial trading and some other time-sensitive stuff. I have very good justifications to want my notifications to come in immediately and without any delay, battery life be damned.