[jeromec]

even a score of 5 is a useful signal in telling me that it's trustworthy

But that can be a false signal. It's quite possible to have eloquent writers make total crap written in an authoritative style sound believable enough to have 5 people nod and upvote. Having no scores forces people to do their own research and form their own conclusion about trustworthiness, which is more work, but better.