> You don't have to see it to feel it.

It's not magic. :) You DO see it. 500 Hz for the median observer; above 800 Hz for some individuals. https://doi.org/10.1038/srep07861

This paper appears to be about the DLP effect that happens when a strobing light moves across your vision. Similar, but not the same thing!

There is still some ability to percieve strobing at a steady state though, even if the amplitude is reduced by visual persistence.