Without taking an extreme or absolutist stance on this issue, I generally agree with the author here. Dark mode should be reserved for after sunset and before sunrise. The eyes are adapted to see daylight levels of light during daytime. If your ambient lighting and screen don't match this, then you're not using your body in the way it's evolved to function. What we need more of are screens with anti-glare and a wide…
Well, I'll meet the dark-mode people halfway, and say that it should always be available to users who want it.
No one is saying that a personal preference for dark mode is invalid, just that it shouldn't be the default option, or worse, the only option.