This article and many of the comments here are mistaking color grading for being the culprit, when it is mostly production design. Grading is obviously the post processing of images, but production design is how the colors are organized to be shot.
Within this current fad, production designers have taken color theory and color symmetry to the extreme and bled all of the primary colors out of what is shot on set. Of course there are accent primaries left in, but they have this down to a science right now and it is why everything looks so perfect these days.
Cinematographers even will gloat about capturing "everything in camera, man" and only having only tweaked minor things in post. Roger Deakins supposedly shot the last Bladerunner like this, where there was little to no grading in the organic scenes.
While I think it's definitely better to get stuff in camera from a craft perspective, this obsession with applying the extreme uses of color theory and winnowing everything down to lifelessness is just so, so boring.
In the 90s things were a little more random and films had a range of colors that lacked symmetry. It felt real! But after the whole teal and orange phase of the 2000s (vomit), people took that same kind of reductionist thinking and broadened the palette ever so slightly.