Comment by OutOfHere
No it isn't. Users should rate in good faith, but honestly and correctly. The score will retain more value if they do. There is a lot that is commonly wrong with Uber drivers:
1. If they have a phone GPS, odds are 80% that it's mounted in a hazardous way or not at all.
2. They play hideous music and should just be silent instead.
3. They take non-urgent and prolonged calls while driving.
4. On rare occasions, some drive dangerously.
All of these are good reasons to not give the highest score.
The issue is that the score is tied to someone's wellbeing and ability to earn an income in an unglamorous, insecure gig. Nothing besides actively putting me in harm's way would convince me to threaten the tenuous economic status of someone else.
e.g. Often times if a man is on an extended call, it's his wife or child, and he apologizes to me. As if calling your family is ever something to apologize for. I'm constantly appalled at how asocial social norms have become.