> Why not use it?

It dramatically cuts housing security, and allows local governments to inflate their own property values by doing what is basically eminent domain without the requirement to show need. Make everyone pay taxes, use those to buy up homes, re-list the homes at a higher price. They can effectively price gouge using tax dollars. This could happen to you at literally any point, and that local government doesn't care if the house won't even sell as long as the other houses rise enough in value to cover the lost tax revenue.

I've also heard the same thing but allowing private citizens to buy them, which is almost worse. Anyone sufficiently well off can just wreck someone else's life. If I hate my neighbor and they report the real value of their house, I can force them to sell it to me so they have to move and I can resell it while only losing fees in the process. They would have to over-value their house by an amount that I'm not okay losing, which ends in a sort of auction of escalating values. At the very tippy top, if I'm Warren Buffet's neighbor there's probably not a value I can pay taxes on that would stop him from buying me out if he wanted. Any number that would be a meaningful loss to him is something I can't even pay the taxes on.