I dunno. Maybe because you're not classy?
Revolvers are comforting, to a lot of us. We're confident with them, and we don't feel undergunned. If you don't feel the same way, that's fine, but capacity is only one of several criteria some of us use when deciding on a carry piece.
You'll notice, too, that a number of posters here either rotate several different kinds of firearms (not all of which are necessarily 5-shot revolvers) as appropriate for the venue or the wardrobe, OR they carry snubby revolvers as a backup to something you might approve of more.