Health cookbooks are the worst for this. They'll call for 2 lbs of beans, 2 onions, a cubic foot of leafy greens, half a dozen carrots, and 1/8 of a tsp of salt. They seem to be ashamed of flavor like it's a naughty sin that they have to hide from the decent folk.
People think salt is bad for you... They don't understand the role of salt in cooking. Let them try eating unsalted bread. It will be an educational experience.
Yes, they're not afraid of "flavor" in general (at least the ones I've encountered call for plenty of chiles, herbs, etc.) but the perceived harms of salt in particular.
