Deteriorating user experience design at Apple

In a recent Philip Greenspan post questioning Apple's competitive edge going forward, I found myself sympathizing with this anecdote:

What about Apple’s supposed leadership in user experience? Plainly the Apple Health programmers didn’t get the memo, but surely the core iOS has a better/cleaner user interface than any Android or (gasp!) Windows phone? I might have thought so until I visited a neighbor. She is intelligent and well-educated, but not passionate about technology. She said that she had hardly gotten any phone calls for weeks. I discovered that her phone was in “Do Not Disturb” mode. She had entered this inadvertently by mistakenly swiping up from the bottom of the screen then touching the moon symbol (a nice icon but there is no explanation of what it means). No programmer at Apple had thought to have the phone display a confirmation dialog box after a few days in DnD mode.