Cemeteries Are A Waste Of Space And Everyone Should Be Cremated Or Composted After Death

It doesn't make sense to me why we have so many cemeteries, some of which are huge. We could be using that land for homes, businesses, agriculture, etc. Even if a person wants to be buried, there's no need to pour cement into the ground or to bury the body in a casket that won't decompose after a few years.