Alright let's say that nobody would buy houses for profit.
What happens next?
People are going to complain that some RPers buy houses for their alts.
Let's say that there are no alts.
Then people are going to complain that person x does not decorate their house and just has it.
Let's say that all the people would decorate their houses.
Then people are going to complain that person x does not spend time in their house...
There would always be something. Yet in the case of resale the house is still on the market while in the other instances it's lost.
btw. All the players have the same chance to buy a house when the new wards are added. The last time that happened I took a day off from work to buy a mansion in Mist... I got stuck in Q and had to settle for a medium house in Goblet. Was I mad about the Q? Well of course. But it was fair race so I had to get over it.