Because of the size? There are other phones out there MUCH larger.
Yes, and those look stupid as well. But I would see one Samsung Note a month. I am seeing iPhone 6+s five at a time.

Personally I think even 5 inch phones are too big for me, I'm irritated that I can't buy a non-crap 4 inch phone.
I built Lego plate mockups of the 6 and 6+, and decided I can't live with the 6+ after carrying it around in my pocket for awhile.
I've learned to live with my 5" Nexus 5, but I often look longingly at my son's Moto G 4.2 inch phone. I'd get one except it doesn't do tethering, and while I don't do that often, when I need it, I really want to have it.