Because it's not necessarily the land that is valuable. South West Surrey, local farmer, producing organic eggs, chicken, beef, pork, in a small scale, but has farm shop, goes to all the farmers markets, provides sausages and burgers for all the local events, including his own van for some.
He had a stroke, is in his eighties, his wife now wants to retire, children don't want to run the farm. It is on the market for £3.5 million, and that really is just the value of the farmhouse, not the land, which is green belt agricultural tied.
Farmer opposite me, and a couple up the hill. Small farms, arable. Fields planted to rape and wheat. All in their eighties. AONB, green belt, Surrey Hills. Very valuable, but not available for housing. They make so little money that they all share resources ie: combined, tractors. But their asset base is very valuable, because South East.
They have to make extra money by keeping grass and hedgerows cut, lending out lorrys, doing stuff on the side. The lorry makes more money than the crops!!
These are not wealthy people. Although on paper they are millionaires.