noise and dithering are different, though. I'm referring to dithering. It's correct that for videos it can be distracting to have the dithering change every frame, particularly if your framerate is low. I'm doing game dev so my framerates are >=60, at which point FRC dither is near-invisible.
I also turn off colored noise as well, because even though having colored noise on lowers luma noise, it does increase chroma noise.
I don't want to see noisy colors moving around on videos, esp. anime.
My monitor does do FRC, so all this software stuff is added noise which is why I like to turn it off.