> Because they need to hide some of what they know about you.
My favorite example of this is in the desktop web version of Google Maps. If you search for some place and try to plot directions from “Your Location” it will prompt for the browser's Geolocation API and will refuse to give directions at all if you don't consent to the prompt: https://i.imgur.com/fIQswnD.png
This is despite the fact that it opens the map with a perfectly-centered and reasonably-sized window around my current location. I have never seen this fail when not using any sort of VPN that moves my GeoIP. They could totally give a reasonable mix–max time estimate based on that window just like the one they show for variable traffic.
My favorite example of this is in the desktop web version of Google Maps. If you search for some place and try to plot directions from “Your Location” it will prompt for the browser's Geolocation API and will refuse to give directions at all if you don't consent to the prompt: https://i.imgur.com/fIQswnD.png
This is despite the fact that it opens the map with a perfectly-centered and reasonably-sized window around my current location. I have never seen this fail when not using any sort of VPN that moves my GeoIP. They could totally give a reasonable mix–max time estimate based on that window just like the one they show for variable traffic.