Why, bearing losses do not matter.
For one, I think bearings wearing out is the main failure mode of most electric motors.
Currently, in all mechanical designs bearing losses are small, because if they were not the design would probably be unworkable or unfeasible. But consider, maybe there are new things that could come into existence which are not feasible today because of bearing losses.
The internet, for example, didn't make it newly possible to send mail to people, but it made it so much easier that it changed what it meant to send mail.