People should be able to do whatever they want with their properties
No, they shouldn't. There are externalities that effect others, and the free market. For example, you don't want people doing things that poison groundwater for the neighbors, right? Anyway, letting property sit idle benefits the landowner but causes issues for neighbors, local government and the free market. It means businesses in those locations get less customers, and local governments less sales tax. If the prope…
A great example is rent control. Sure it helps current tenants, but it distorts the rental market such that it disincentivizes putting new homes on the market, and the exact opposite of what you want - higher rents.