The human brain evolved to recognize threats in the wilderness.

We see movement and patterns very well because early hominid predators were very fast and camouflaged, so seeing the patterns of their fur and being able to react to sudden movements meant those early people didn’t die.

But evolution doesn’t optimize. Things only evolve up to the point where something lives long enough to reproduce. Maybe over extremely long time spans things will improve if they help find mates, but that is all evolution does.

Your brain perceives things fast enough for you not to get eaten by a tiger. How fast is that? Who the fuck knows.

All the being said, I like higher HZ monitors. I feel like I can perceive motion and react to things more quickly if the frame rate is higher. The smoother something looks, the more likely I feel that I can detect something like part of a character model rounding a corner. But no digital computer is ever going to have analog “frame times”, so any refresh rate you think feels comfortable is probably fine.