Yes because with Uber you know what you're getting. I'm not sure if you're familiar with London black cabs, but as far as I know they are the most expensive taxis in the world, and they justify the expense by citing their training, knowledge and expertise. Short of that all you're getting is a tight turning radius (admittedly quite useful in London).

Google Maps and a profile photo you can see on your phone without having to squint at the little image in the front of the black cab, I'd say yes.

The difference being instant feedback. The low ratings one would garner by doing this with Uber would probably lead to the irresponsible driver getting booted, where with a traditional cab, the complaint process is significantly more involved.