They are afraid of letting us access the glamor dresser outside of the guest house because of server bandwith concerns.
What does that tell you in regards to housing?
Right, it's not about what the DEVs want or not want, it's about their architecture not being able to cope.
Even Blizzard had A LOT of problems with Garrisons (essentially a personal instance for every player) so I fully understand SE's DEVs shying away from that "obvious solution".
I get that it is frustrating for people that would like a house and can't because none are available but unless SE does major upgrade server side, it won't change.