Motion blur is only "accurate" if you assume that the viewer's eyeballs remain still and don't follow the moving object. Having said that not blurring isn't accurate either on current LCDs when the viewer follows the object. This is what black frame insertion is meant to correct.
Re:Text Rendering Hates You
by SpaceManiac on Sunday September 29, 2019 @01:35PM
(#21108376)
Antialiasing (nominally) makes text easier to read. Motion blur makes everything it's applied to harder to see.
For example, most people expect antialiasing (i.e., subsampling across space) but we seem to have written off the idea of motion blur (i.e., subsampling across time), except in some games.
It’s be technically more accurate to draw a quickly-dragged mouse cursor with a (correctly computed) blur, but that’s not generally easy to render today. And motion blur of moving subpixel antialiased text sounds like a nightmare right now, but with the right abstractions it might not be.