Why?
Pay no attention to the hivemind or the audiophile cult. I've had plenty headphones in my life and BOSE are among the best I've had at their price point. YMMV.
More and more monkeys.
Why did I get them? I like the industrial design of their products, and the sound is more than good enough for me.
Do I know that I can get better sounding gear for my money? Yes, absolutely. In fact, I used to hate on Bose for that very reason when I was younger.
Do I care that I can get better sounding gear for my money? Not nearly as much as I used to. When I am buying audio gear, I'm no longer interested in doing research. I just want something (preferably compact) that looks nice in my home and sounds good to my non-audiophile ears. Having said that, everyone has their own set of priorities, and should do what is best for their own situation.