more fair
Fair by what standard? With low numbers you will have increments that switch things around. You can't rate a game with fractions.
If those 12 ratings game had 4.350 raw, how does that work out? Because that would be 52.2 stars, which is not possible. Also 4.323 * 13 is 56.2
Anyways that is around 50 stars, so one star difference is about 0.02, and the difference between those numbers is 0.027.
I do not think, I understand those numbers. But I can tell you, that a missing rating should have an effect. Not calculating that effect would be unfair. But how to factor it in is the big question. Not rating a game, and more, not even playing a game is a kind of rating in it self. So having more ratings is a form of success that should be weighted.