We employ it (or its variations such as “The only problem with that is . . .”) to establish that our expertise or authority is superior to someone else’s. It doesn’t mean that what we say is correct or useful. It’s simply a way of inserting ourselves into a situation as chief arbiter or senior critic. The only problem with that (to coin a phrase) is how little we like or respect our critics. They’re annoying. And over time, we treat them as if they’re carrying avian flu. We avoid them. We stop working with them. We refuse to help them.