Well, you do, ultimately. Remember, you’re talking about a system where there is agency between lifetimes as well. I’m not familiar enough with non-human karmic mechanics to definitively tell you, but in most systems it’s that you a “burning off” the karma of being en evil asshole by being demoted from human to less sentient lifeforms. So sending Hitler or Cecil Rhodes or Andrew Jackson would then indeed spend 40,000 lifetimes being killed over and over again before getting back in the running to have a central nervous system.
Well, you do, ultimately. Remember, you’re talking about a system where there is agency between lifetimes as well. I’m not familiar enough with non-human karmic mechanics to definitively tell you, but in most systems it’s that you a “burning off” the karma of being en evil asshole by being demoted from human to less sentient lifeforms. So sending Hitler or Cecil Rhodes or Andrew Jackson would then indeed spend 40,000 lifetimes being killed over and over again before getting back in the running to have a central nervous system.