I really don’t have a problem with this, as long as a person is buried in a coffin I think.
I wouldn’t have a problem buying a house with the old folks buried in the yard, as long as they’re not next to the house and as long as they died of natural causes. ;)
What did we do before the price of a burial was such a rip off? What came naturally of course.
Remains are usually required also to be in a cement liner far from a residential zone -- as a cemetery is the modern equivalent of a "south 40". Human decomposition can enter the water table. Animals will dig up a shallow grave; Scottish people, also American indians and frontier folks often covered graves with cairns (pyramids of stones) to prevent that. And if the next owners want to dig a garden, discovery of bones in a shallow grave would put them on the hook for identifying the corpse and all the costs involved with moving the remains to a more suitable location.
We may hate some of the effects of living close to one another in civilization, but there are often practical reasons.