No way. Land has low carrying cost and people will sit on it for years to speculate or hold neighbors hostage.
So yes, if you want to game the system and sit on land, there's little tax incentive to sell it.
People have different risk evaluation and time horizons. If you are sitting on a lot of capital, it’s a no brainer to buy land when financial bubbles pop and leveraged owners need to unload cheap.
Not only do you have a long term inflation hedge, but it’s real property, which means you can borrow against it to get cash without paying taxes via dividends or sale.
Iowa is great for investors like this because the whole state is just a big corn factory. The government tries to keep commodity prices less volatile, so you can project lease income with some precision using the value of corn.