Comment by rpdillon

This just isn't true. You're assuming the conclusion and saying the routes will have equal amounts of traffic and that one will be way longer and that it's unlikely you're saving time. Except people that have experience with Google Maps have watched it flag upcoming traffic congestion and explicitly reroute you and ask you to confirm and show the time difference. That's the real-time aspect, but it can also project forward in time and estimate what the traffic along routes will be at the time you want to travel, so it's also an important planning tool.

I have no idea why it's contentious that having nationwide surveillance of traffic patterns would result in better routing decisions.