Inflation is a thing that exists. Saying that someone is bad simply because they want to update the value of their property is dumb. Also, let’s say granny wants to downisze. Should she sell her home for a value way below market and then be unable to buy a smaller home for herself?
Not really, no. If you’re buying a house for yourself and after that you want to buy a bigger or smaller house, it’d be very dumb to sell waaaay under market when no one else will do that for you in return. You’d be either unable to find a home you can afford or you’d have to spend all of the money from a big house to buy a small apartment.
I think you have a lot of resentment built up and that’s bad for both objectivity and your own health.
You’re getting worked up over a fictional person that owns a fictional house and wants to sell it for a fictional price. On top of that, you’re making up a lot of details to get even more upset. Relax dude.