I came across Waze when I was looking to see if there was an app that gathered stats of traffic patterns, eg. what days does a particular route have the most traffic, when, is average drive time impacted by how fast you try to go, what hours are the busiest, etc. etc.
We all have anecdotal thoughts about the best way and time to do our daily commute. It would be nice to have a good chunk of data to either confirm or deny these thoughts.
It seems to me that Waze could easily capture this data and make it available.
While I do not disagree with your assumption, Waze is a for-profit company looking to gather this data and use it to promote their app, and sell the data to other companies, etc… I don’t see how it would benefit them to make it freely available to anyone.