That would have allowed people to artificially chase rankings even faster and more efficiently. It makes the problem worse, not better.
It's also dangerous to ask for the exact criteria because they are ever changing. Google et al don't want to be prescriptive about what a good site is, they want to recognize what a good one is. You make a good one, they'll figure out how to recognize it.
They can't sit down and publish "The Definitive Guide to a Good Website". That's just not their role and it will be out of date before it's published.