system
A chat on subreddit /r/pcmasterrace
human
Your eyes naturally focus on the centre and the parts in your peripheral vision go out of focus naturally in the same way it does in real life. Why do you need post processing motion blur when it is not present in reality?
gpt
Wave your hand quickly in front of your face.

Motion blur is a thing in real life.

It also helps the brain interprite information 'between' frames. So long as the blur is done right. If something is moving fast enough for motion blur to kick in, you aren't loosing fine detail.