You really can't understand just how completely worthless Steam is a a platform for reviews until you've actually tried to write reviews on it. Write an opinion that goes even slightly against the grain of popular opinion, even as a throwaway line in a review about an entirely different game, and it might as well not exist. You'll get marked as a "funny" review, get "awarded" a clown emoji, and comments will tell you to git gud, while meanwhile ten thousand ASCII image macro "reviews" by people who often haven't played the game, much less thought critically about it, will get pushed to the top. It's an orgy of gamer bros high-fiving themselves for liking popular things.
And Valve has no reason to care that their system rewards this, because since Steam's review system self-selects for idiots and harasses people who don't share in with this groupthink, positive reviews are more likely to appear on the front page and are more likely to be written. It makes games appear better than they are, which means more sales. What motivation do they have to improve this?
Of course this is a microsm of video game culture and game reviewing as a whole, but that doesn't make it any less depressing.