I think this is basically a argument that star ratings are worthless, rather than that using all 5 stars makes more sense. Obviously, many Uber drivers do keep >4.6 ratings for extended periods. And since most people presumably don't know about the 4.6 rule, it's not a collective concession to Uber's standards; people are just genuinely rating drivers 5 stars much of the time.
I recommend (to everyone interested) asking a few friends how they use star ratings, on Uber or anywhere else. My experience is that people say all of "I give three stars for average", "I give four stars for average because we're used to grade inflation", and "I give 5 stars unless there was a reason to subtract from it".
Given that, star ratings without explicit guidance on meaning are sort of a disaster. I'm not so much annoyed by which number Uber ties people's livelihoods to as by the whole decision to use a bad system when so many better ones are available.
I recommend (to everyone interested) asking a few friends how they use star ratings, on Uber or anywhere else. My experience is that people say all of "I give three stars for average", "I give four stars for average because we're used to grade inflation", and "I give 5 stars unless there was a reason to subtract from it".
Given that, star ratings without explicit guidance on meaning are sort of a disaster. I'm not so much annoyed by which number Uber ties people's livelihoods to as by the whole decision to use a bad system when so many better ones are available.