They only do that to save RAM, imagine having trillions of physics enabled rod corpses all over the already incredibly fucked up Matrix world we live in
I didn't know they were based on a real thing when I read that fight in the manga so I thought Araki had just made up some random shit about these heat-stealing aliens and expected us all to be familiar with them.
Morbid curiosity and people-gawking has led me to get Facebook post recommendations for all kinds of stuff like this:
People who think that a drop of water in front of the sky on a cctv camera lens is Planet X, which is normally hidden from view by magic/the government/the elites/aliens.
Bugs, drops of water, dust, or fog on a cctv camera are any combination of ghosts, fairies, spirits, etc.
Flat earthers and chemtrailers. Self-explanatory.
Dinosaurs never existed. Surprisingly this isn't just for young-earth creationists anymore - it's also a lie perpetrated by the government/elites.
something similar happened out here, some local ufo guy had some newer generation of night vis goggles and was looking at the sky seeing "space battles" but nah it was just bugs
made for some cool paranormal worldbuilding though.
i love the fictional idea of some other temporal layer of life existing in a state that would be equivalent to the temporal relationship humans have with trees