If your going to try to win by invoking Godwin's Law, you really should have the good form to at least make a plausible argument for why the relevant superheroes actually have the slightest bit of similar moral standing. *rollseyes*
Also, nothing of what you've said changes. . . *anything* that I wrote. The issue is not "Is it better to have a society where the government has a monopoly on strategic power". The issue is "Does the government, in fact, have a monopoly on strategic power". In the case of the MCU and other such settings, the fundamental factual situation is that the government *doesn't* have such a monopoly, and it *can't get it*. The existence of the Superhuman, whether involving explicit superpowers, impossible scientific genius, or 'merely' inhuman levels of skill, fundamentally breaks the assumption that a government can monopolize power. Do you find that prospect a terrifying outside context problem? Great! On an intellectual level you probably should! Does it justify opening up the death camps? Nope. . . and that is *exactly* the direction the logic of the Accords goes: that the threat to the existing societal status quo by superhumans is so great as to justify any imaginable measure against it. Ensuring the peace of rule-by-law society enforced by governmental monopoly on power is so precious and important, that you can't care how many men women and children you need to kill to preserve it. *ahem*
So, once, here are the actual viable branches for how society in general can respond to superhumans in the MCU:
1. "Convince a large enough number of superhumans that they want to maintain the general societal status quo". The power monopoly is still broken, and rule of law exists only because enough of those with the power to break it decide to protect it. However, the actual lives of people continue on more or less as before.
2. "Try to force the superheroes to kneel and obey, and rather than fight they largely retire and disappear". Congratulations, you've preserved the monopoly on power and the rule of. . . oh, wait, the world just got conquered or destroyed by one of the superpowered threats that they used to be defending against, but aren't anymore. And which you can't do anything about, because you don't have the power to do anything about it and never did. Oops.
3. "Try to force the superheroes to obey, they fight back, and they win". Because the whole reason this is happening in the first place is that the superhumans possess strategic power comparable with nations. Better hope whoever are leading the victors are in a good mood, because you've just introduced the world to government by god-kings. Don't blame them, you are the one who caused it by deliberately starting a war they didn't want in the first place.
4. "Try to force the superheroes to obey, start armageddon, civilization collapses". I mean, you *could* respond to all these superhumans by just launching nukes everywhere, but that doesn't mean you win. It means everyone loses. And also, the survivors who will be rebuilding and ruling in the wastes? Going to be pretty heavily biased towards superhumans, anyway, so this ultimately is a variant on Scenario 3, just uglier with more people dead. I hope you are proud. After all, you had to kill everyone in order to save them!