Because science has never been lopsided or influenced to present a specific data set. But I get your point, and for the most part I agree.
Why do you think it's "biased"? How are manufacturers benefiting from this science? Science KNOWS a lot about eye optics and science KNOWS what the eye can differentiate - "simple" geometry. And blind tests confirm that people can't tell the difference (until you "favor" the higher def with certain setting and tell people it's 4K or 1080p or whatever).
People can claim otherwise all they want. The science is unobjectionable.