I don't quite see how it's a misleading example. They notice something that feels good, associate it with utility, and then keep using it, despite the fact that its only utility is the pleasure they derive from it, and they are sacrificing other utility-values in the process for a total net negative utility.

Couldn't the same thing said about making use of a sexbot? About eating tasty food which happens to be more expensive and less healthy than other food which is not as tasty?