any time you have a higher-level class of utility, the lower-level classes of utility stop being relevant to your decisions

Wait... certainly, if you lexicographically value (brightness, redness) of a light, and somehow manage to be in a scenario where you can't make the light brighter, and somehow manage to know that, then the redness value becomes relevant.

What I mean is that the environment itself makes such precise situations rare (a non-practical issue), and an imprecise algorithm makes it hard to detect when, if ever, they occur (a practical issue).