Same with the train - I use a website that shows the exact locations of all the MBTA trains, and I am able to accurately predict how long the train will sit outside of the Alewife station (which is infuriating BTW) based on the number of trains currently at the platform. A prediction would not be able to take into account this domain knowledge and would be completely worthless.
This x100.
I do this all the time with Lyft drivers. "No, please don't listen to Google Maps for this. The route it is trying to take you on goes from totally open to totally clogged over the span of 6:45AM to 7:00AM. Trust me, the route I am having you take me on will be faster by the time we get there."
People are way more clever than you think.