The problem with not having a scoring system is that someone will then go out and make a scoring system.
That's fine, except if they do, I'm not likely to read that review.
With respect, what you don't read isn't important. (Or I, for that matter.)
When I was a wee lad, I'd read magazines for game reviews. I got burned a couple times, so I started asking friends their opinions.
Nowadays, I don't read many reviews, unless word of mouth is good, first.
Game publishers can't really reach me as easily as someone who reads game reviews and buys based on scores. Enough buyers do exactly this to make my wishes mostly irrelevant.
Game players want a scoring system because it's a way to be told which game to buy, and to self-congratulate on a purchase already made. ("Well I don't want it!" Me neither, and that's exactly why we're irrelevant. As Mitt Romney would see it, we are folks who wouldn't swing that way anyhow.)
Game publishers want a scoring system because it's a metric they can point at and say "success" or "failure," and take action on. Want to push for that sequel? Point at the Metacritic score. Want to get rid of a troublesome lead developer, who still made the company millions? Point at the Metacritic score. It's a dumb metric but one that swings a big hammer anyway.
So, we can wish for the death of the scoring systems, we can analyze how badly they work, and gnash our teeth about it, but they're not going anywhere. Enough people want them, or at least rely on them. If they didn't exist, someone would invent them.
From the perspective of a person who plays video games, this really doesn't bother me much. I'm not being deprived of good video games. I'm frickin' flush with them. And the majority of them are ones that sail under the radar, and as a whole, the indie scene is getting along fine, even with Metacritic entries that would topple huge titles.
It does, however, put small to medium-sized game companies in a tricky situation. Rather than rely on Metacritic metrics, they have to cultivate a fanbase the old fashioned way. It's not very fair, but name me a sector of business these days where the little guy isn't being constantly tread upon by towering giants?