>normally we don’t claim that those are too bright
I print a lot of books, and I find that a more "cream" colored paper is much more pleasant to read for an extended period of time. YMMV but if there's more than a paragraph of text involved I'd prefer a lower contrast ratio.
Adjusting the screen brightness means you need to calibrate your screen again from scratch. All other settings have to be redone after changing the brightness, and you need to generate a new color profile.
Standard brightness has a fixed value, adjust contrast in your designs, not in the settings of the screen.
I print a lot of books, and I find that a more "cream" colored paper is much more pleasant to read for an extended period of time. YMMV but if there's more than a paragraph of text involved I'd prefer a lower contrast ratio.