I have read about this and for some reason it kind of reminds me of people having "emotional support animals." It seems like some strange fad phenomenon.
I stay in Hampton Inns a lot when I travel for work. They have these big, thick down comforters on all the beds winter and summer. The first thing I do is toss that thing on the floor, grab the thin bed spread out of the top of the closet, put that thing on the bed and crank down on the A/C to about 66 degrees.