Wanna se another interesting example (use google translate), here are statistics of our volunteer based and taxes paid (for everyone in need, even tourists, including helicopter transport) mountain rescue service: https://www.grzs.si/resevanje/statistika-nesrec/
Check number of accidents since 2006 (google maps came out 2005) and constant rise to 2023 (more than twice of the number of interventions). Freaking maps are showing the steepest mountain roads (Alps), to parts without phone signal. Google gets you just far enough to get into troubles.
Edit:
https://www.wired.com/story/99-phones-fake-google-maps-traff...
Somebody did it.
I believe it is a funnel of things: Slovenia became part of EU. GPS navigation in cars and smartphones became a thing. Google isn't even the only traffic data provider. Slovenia has RDS-TMC since 2009. So even a boring TomTom will show some form of congestion info.
But I agree with you, that navigation tools should not direct traffic away from the main roads (especial transit roads). Traffic planners should somehow be able to weight streets or routes.
Japan actually has some soft regulations in this space about routing and road visibility (e.g. residential roads are hidden when you’re on thoroughfares). But they’re just suggestions so only domestic companies follow them and Google, Apple, etc still provide their usual global algorithms.
Maybe there’s a good solution to this, but I don’t think it’s getting rid of mapping services and going back to security through obscurity.