The party in power is expected to lie cheat and steal to maintain their position and the opposition parties are supposed to keep them in check. Adversarial systems seem to work pretty well since the incentives align -- way better than I would expect an honor system to work at least.
Any system that depends on the existence of angels is pretty much doomed from the start.
What does this mean? Who are the rule enforcers?
So in general it's not enough for them to be bipartisan, they need to be a group that collectively opossss every action someone takes. When all the dust settles the only things people will actually be able to do are the things permitted by the rules.
Also, claiming that if you had a genie that could make your candidates win it would be silly to refuse is kind of not great. I think for a lot of people that it would be downright disturbing to use that and they would instead realize that if their candidate lost then that is the will of the people and that's democracy and what we all supposedly should want. Trying to make it anything but is basically cheating, which you are admitting if you had the opportunity you would gladly do. I'm not sure I would claim that as happily as you have.
You're almost arguing that corruption is the norm and that it really can be great if it works in your favor. This is a pretty disgusting argument.
We have fair elections so that the losing party can accept the results and move on.
You might be able to get away with defining such processes as fair but it wouldn't really align with what most people mean which is representative.
We're talking about the belligerents working the system for partisan advantage. Everyone accepting the process and results is the (practical) definition of fair.
What are you talking about? Mathematical fairness of various voting systems? Totally different discussion.