Maybe one distinction here is that you mention this question: Under which office can a random maniac who somehow ends up in that position cause more chaos or seize power?
But there is another question: Which office in practice results in more powerful officeholders, holding the population itself constant?
Yes, that’s a typo.
This is too historically contingent. Presidential systems have dominated the less stable American and African countries while European and Asian countries that have been more stable more often have parliaments. I’m not convinced that there is empirical evidence of this kind.
I agree that parliaments have a much more intuitive nature. Corporations are run with a sovereign board who appoints a dictatorial CEO, not with independent branches of power in a balance.
Why do you think it’s better to have term limits?