A reasonable hypothesis would be that greater Waze use would correlate to higher numbers of accidents in residential neighborhoods.
That is no more than information. That is exactly information -- information about the most efficient route from one's location to one's destination.
So, yes, blaming Waze is blaming information.
If there is blame to be assigned for residential roads being part of the most efficient route between two points that are outside of those roads locale, it belongs to those responsible for the design of the road system, not to the app providing information about the results of that design in the current traffic environment.
Nope. In this respect (transportation routes), it is quite literally and merely information. It does not make promises.
Also, "promise," meaning indicative of potential.