LED backlighting is useful if you do a lot of typing in the dark. I don't. So I really don't need all those lights in my keyboard(s). I never really considered that hipsterism; I guess the engineer in me simply prefers to leave out pieces and parts I'm never going to use, and not out of cost concerns, but just as a design principle.
By the same token, I'm not sure what condescending term to use for those who actually like a keyboard that lights up like a Christmas tree, but I'm sure someone around here can provide us with one.