I don't think I could stand to have any sort of lit-up screen doing something in my eyeline when I'm driving. I turn off the backlight on the dashboard when I'm driving at night because it annoys me.
Why would I care about speed traps or road obstacles? "Poor traffic conditions" isn't really something I can do much about, either.
Also, those notifications can likely be conveyed using audio-only warnings, anyway. Making all of this discussion a bit moot.
Finally the entire benefit of live navigation is to find alternate routes with less traffic! That is something you could literally do about.
I don't want audio alerts for anything either. It's really simple - I don't want anything in the car that beeps, flashes, lights up, makes noise, or indeed does anything that is not directly part of making the car go in the required direction at the required speed.
"I don't understand why other people would do X"
"Well, it can be because of Y, Z, or W."
"But I don't do/need/want any of those"
"..."
It's like it's a fundamental failure to understand that other minds are separate from yours and have different motives and preferences.