There is of course the supposed capitalistic reason of doing so, which is to make it more lucrative for others to build additional homes. Additional homes should in turn dampen the prices again. This however hasn’t been panning out the last few decades, as the prices have kept inflating.

I mean, in many cases you could. In many places there aren’t even laws against it. I’m personally of the opinion that we should treat animals similar to how we would treat humans, thus the translation for others to consider the same.

I mean, is cannibalism really the worst problem here?

Humans are omnivores and if the alternative is to throw unused human parts underground or cremate them, feeding them to new humans is at least not a waste.