Yes this is very true. Some apps like Truecaller just destroy the battery like there is no tommorow. Most other app including some games keep running just to tell me when it's time to collect my mystery box.

Point being the majority of the apps are badly coded to poll or drain battery, send unnecessary notifications.

This reminds me of the popup blocker thing in web browsers. While there were some legitimate uses most of the time it's abused so every browser blocked it.