>Redundancy in communication is a feature, not a bug

Too much junk information trains users to ignore them, which leads to hilarity ensuing if there also is valuable information every once in a while.

Moral is don't send information to a user if it's not strictly necessary.

Further reading:

https://en.wikipedia.org/wiki/Banner_blindness

https://en.wikipedia.org/wiki/Alarm_fatigue

https://en.wikipedia.org/wiki/Inattentional_blindness

https://en.wikipedia.org/wiki/Habituation