It makes perfect sense but the generations that have to make that choice today (because they don't care about those dead people anymore) don't want to think tha

It makes perfect sense but the generations that have to make that choice today (because they don't care about those dead people anymore) don't want to think tha they too will one day not matter anymore. It's a hard sell unless there are stronger reasons (e.g. housing is really really terrible that people will want to "disturb the dead"). Yeah, humans... :-)