I don't believe people are actually confounded by this acquisition. The headphones are wildly profitable and the Beats brand is incredibly strong. This deal is easily justifiable.
Seems like those days, if they haven't received press release and a press package the only thing analyst can say is that they are puzzled.
Thankfully in a few weeks it will be time for the annual batch of rumour about the next iPhone. That has been almost a year since the last article predicting the 5in iPhone and the iWatch.
If it was company X that was doing the acquisition, no one would care too much. It's the Apple involvement that makes it confounding, since Apple doesn't do acquisitions of this sort. They don't buy brands, they buy tech or people.