If I had a house and Bansky decorated it, I would probably want to sell, because owning a Bansky has no particular value to me, but I could get a lot of money for it from someone else. And yeah, I can see that selling a house when one wasn’t planning on doing so is a hassle and a nuisance (which would of course be offset by the money, but still a hassle).
But this is someone who was already in the process of selling their house. They had that hassle anyway. All that’s changing is that they’ll now get a whole lot more money for it. Yeah, I’m not seeing the complaint, there.