It's implicit that "more useful" means for users - but removing the headphone jack is more useful for the manufacturer (which makes it terrible by my standards too, but not inexplicable).
See my other comment! I wasn’t necessarily talking about that (depends on what exactly you mean by that). Although that’s true too. Anything they can do to improve the product, even if it’s a trade off, can be a good thing. Shouldn’t take a narrow (or so it seems) view like that!