Not advocating for that specific list of actions, but the idea is that the courts have the power to do those kinds of things, not politicians. That's the whole point - you set up the legal system in a way that helps to keep democracy stable and then the courts enforce that so politicians don't have untrammelled power. That's (theoretically) why the judiciary is a separate branch of government.
Americans made their bed, now let them lay in it. Ideally those tools would have been used against him, but since they weren't... now is the time to reap the results of that inaction.
Every democracy has a failure point. The US seems to be past that now, where the executive is starting to ignore the judicial branch. In my view, if the institutions were working correctly, Trump would never have been able to stand again after January 6th, and this would have been as a result of judgements by judges appointed by the executive. But institutions are run by humans and sometimes nothing can save them.
