I feel like the whole emoji example might favor your point of view, but that, delightfully, grandparent commenter’s example is one of the better counterpoints I’ve seen.

Selectively deployed, a glint of extra brightness, above and beyond the “100%” baseline, simulates the glints and shimmers that draw our eyes naturally—in this case, in the same manner as gilt on the physical counterpart to the books they’re depicting. It fits in cleverly with a long tradition for that specific context.

Where I agree is with the idea that brighter-for-brighter’s-sake is not better after a certain point, any more than color-because-we-can. And it seems, as far as I can tell, that uniformly cranking up the full frame brightness into the HDR range is not The Done Thing, at least in film and design, at least so far. Possibly for compatibility with the wide range of displays stuff will end up on.

Hm, so you're saying we're going to be using browsers that give authors/publishers another ability to "draw our eyes naturally"? What could possibly go wrong. I'd be turning it off now if I had hardware that supported it.