A story recounted here last year [0]:
During the development of the first iPhone, Ive and his team became enamored with the look of an extruded aluminum prototype. Even though it was immediately apparent that the model's sharp edges made it physically painful to use as a phone, they persisted in trying to push the design and paper over its principal practical problems. It took Steve Jobs to finally step in, point out the obvious, and check Jony Ive's worst tendencies. [1]
Steve Jobs is gone, and nobody is left to fulfill his roles.
[0]: https://news.ycombinator.com/item?id=17056930
[1]: https://www.cultofmac.com/488008/jony-ive-book-excerpt-iphon...