Why not? Instead of walk-in closets, real estate agents can advertise, "Bedrooms accommodate 4 size XL Go-N-Home wardrobes in the provided nooks". And, "There's room for enough Stow-N-Go dressers and nightstands for your in-laws to drop in anytime".
part of the reason is in the ubc, for a room too be a bedroom it must have a built in closet and it can not have a door into uninhabitable space( read that as garage)