Anyone I watch older than 50 years old is constantly frustrated by google, they just don't know what's good, what's not. I think they use it because it's the "norm" and that is the only reason.
And as far as everyone else.. I have no idea to be quite honest. I have a fairly big handful of non-techie friends who think google sucks but is good enough so there is no real incentive to change.
With any habit people don't change it unless they have a huge reason to. No one stops eating double cheeseburgers until their doctor literally tells them they are going to die. I think that's what we're up against here.