Tell me with a straight face that you know more than one person beside yourself that actually looks at those lights at startup and checks that they are working. :-) I mean, you're right, but I'd venture to guess that for a lot of people the "lamp test" doesn't mean anything to them.

I tend to think that this is one of those things that amateurs would only notice at first as, "I think that one of those red lights is not turning on at ignition." Not specifically the brake fluid level.