You can make that claim, but the fact of the matter is that the US is a representative democracy, and our elected representatives make the laws. We are free to choose other people for the job if we want different laws. The vast majority of people were not lucky enough to be in a situation where their bumpkin ancestors just happened to possess a large swath of land, and so we don't vote to protect large swaths of inherited land.
They owe taxes? They can pay them. They can afford to pay them because they have inherited assets. "Oh no, they're gonna get a diminished inheritance. What a disaster." I'm not getting one, and neither are most of the people in the country. They'll still have their inheritance, they just won't have the land. And they aren't entitled to it if they don't have the money to pay their taxes.