It's like all the food being replaced by MacDonalds food that is served from a replicator (from Star Trek). Sure, we can survive on it, sort of, but if all we ever know is this food and we're too busy to cook (or no one knows how to manufacture a stove) then we'll never know anything else. Maybe someone will learn how to tweak the recipe a little but our minds will be conditioned to context-switch so much that we'll never even think of learning to cook great meals.
That's what LLMs do. They're shit.