Truth be told, something palatable and pleasant that works can be a very, very high bar from a UX perspective. When software collides with the real world, you get a lot of complexity. Even organizations the size of Google and Apple can't produce a Maps app that doesn't do wacky stuff that seems designed to frustrate the user while trying to get someone killed. By comparison, how something looks is dirt cheap. (As usual, it's far cheaper to signal quality than it is to build it.)
When it has to deal with the "real world," mobile QA and UX is hard, and doing it to a high level is probably greatly underestimated in cost while being quite expensive. They say a picture is a thousand words, and seeing it yourself is a few more orders of magnitude. If your only feedback is logging/callbacks/snippets of text from users, you're only getting a small sliver of the true picture.