The goal of an interface is clear: it is how a human interacts with a machine. Buttons, dials, latches, sliders - those are interfaces. We can reason about them, make taxonomies, determine what operations they are appropriate for (or not), and so on.
“User experience” tries to capture everything into a nebulous haze that exists not to serve a human with a task to accomplish that a tool will assist with - but a business and how it will capture “users” and guide them on the “journey” it deems most appropriate to reach its sales goals.
Design students won’t be able to formulate a cogent thought on what the properties of appropriate interface feedback are, but they’ll be great at cranking out “personas” and sleek landing pages that enumerate marketing points. Something’s rotten.