There seems to be a confusion between dark mode (more black/less white in UI) and night mode (less cold/more warm colors in UI). The latter addresses the blue light & sleep issue, the former may not. So your poll wrongly equates dark with night mode. And although you state that the orange colors of the Nick app are "difficult to look at", orange shades will disturb your sleep less.
Also on Apple TV it is called dark mode not night mode as you state. It is designed to avoid sharp jumps in brightness and therefore eye strain, not the blue light/sleep issue.
These polls are pointless. The only people that are really inclined to answer are those that want a dark mode. Those that don't want it, or simply don't care, are less likely to answer.