I guess for me it espoused a philosophy of being a big magic item and no attempts to make economic sense. I never demanded this of normal material because I see adventurers as anomolies. But the old 2e stronghold book, for example, made some attempt at simulationism instead of serving up kewl powers in convenient brick and mortar format.
I guess I think that such things are appropriate for characters, not dwellings.
Anyways, I don't hate it, it just proved useless to the way that I play (and players that I lent it to never ended up using it, so I am not so sure it's all that easy, either.)
Anyways, after the first time you say no, the next time is easier still. I still buy a lot of WotC stuff, but I am a bit more selective, and passed up Heroes of Battle and Weapons of Legacy, as I considered the money that would be spent on them better spent elsewhere, and their topics done better by third party products I already own.