Why not? The fashion industry is ripe for disruption and Apple is best positioned to do it. Here's why: https://m.youtube.com/watch?v=RgKoqLLHvFA
If you want to skip some great content and get right to the reason, fast forward to 5:30 or so.
Excellent video. Thanks for sharing and suddenly making my time reading the forums productive for the first time ever.
On another note, if you want to see why Apple hired Ahrendts, look at the slide starting at around 6:30. There are some smart, far-sighted people at Apple, and they are going after the opportunity highlighted in this slide. They see the money on the table.