Except, yanno, digital audio is far superior to what can be delivered over a headphone jack. So there is that small detail.
It's stuff like this that really annoys me. It demonstrates so many Apple users have no fundamental understanding of audio at all.
What you hear through your headphones / speakers and ultimately anything in the world is analog. Digital must be converted to analog.
Digital audio is merely a means to transport music. It doesn't dictate the quality one bit.
In fact, 99% of digital music is compressed and if music were truly completely analog, the quality would blow your mind. Nothing can beat it because the quality goes way beyond your perception of hearing.