It's hilarious to me that, in reading over the last couple of pages, the Metacritic White Knights are essentially agreeing with the OP's premise: That the scores on Metacritic are a joke, and should be ignored.
Such as
this oneScores in themselves are meaningless to begin with, even if we talk only about theorical 100 % honest reviews.
Some people consider 5/10 an "average, moderately fun" game. Many others consider anything under 7 as garbage. Even more think in a totally binary way, putting 10/10 "best game eva'" on everything they like, even if full of glaring flaws (or 0/10 "worst game eva'" on anything they dislike, even if filled with nice elements).
And that's only speaking, again, of 100 % honest reviews.
That qualifier at the end speaks to the major concern I have, which reviews are 100% honest? We're told now that we should ignore the scores, and only read the reviews. Well, by ignoring the scores, which reviews should one read? Without some kind of reason to look at the actual review, there's no reason to read any of them, which again leaves the site reveling in it's irrelevance.
Then there's this gem:
Integrity doesn't matter.
Could be. Again I care very little of MT's integrity, or even my own really. What I care for is its usefulness, and you still have nothing to say about the fact that not a single professional review, perhaps save for AngryJOe but he's a youtuber - hardly fit in your lofty standard surely, point out that the PC control is clunky to put it nicely, something that is mentioned in abundance on MT. And that's just one example.
And before you go on about how's you have no problem with the control, or it's not that bad, or anything to that effect, let me say right now that your point would be perfectly valid. After all gaming is a personal experience. People are entitled to like all sorts of crap. But let me point out that the very first PC gameplay video of DAI was played on a controller. A mouse and keyboard video was released weeks later after complaints of baffled fans. Well now everyone can see why.
Which is kind of sad, really, because I am onboard for the last bit. However, claiming that professional reviews aren't any better sort of shoots holes in the argument that integrity doesn't matter, doesn't it? If integrity doesn't matter, you can just get your reviews from Metacritic, wait, what??? Irony is delicious with my morning coffee.
TL;DR: Since we have the people that are staunchly defending Metacritic telling us the same thing the OP did, that the review scores can be completely ignored, what are they arguing about?