I think the real question is "Why the fuck do you care what someone else does or doesn't have on their snowboard?". It's all a matter of personal preference and opinion. I can ride with one or without. My preference is to have one if the topsheet of the board is a slick finish. If it's more of a matte finish, then I don't find it necessary. Point is, why care? Just go ride.
I have the EXACT same answer.
This should have been the end of this thread.