You should rephase that:
"But in the future very corrupt rich people will avoid running for President because they know they will be relentlessly scrutinized by the public and the DOJ and be held accountable for their crimes. Besides. wealthy businesspeople don't know their ass from their elbow when it comes to running a government - as Trump absolutely proved"
Politicians are the most scrutinized people in the world. They have the media, the people, all sorts of watchdog groups and the political opposition constantly watching them. Your idea that all politicians are corrupt is nonsense - you've been watching too many political dramas on T.V. The only extensive level of corruption by politicians is the LEGAL corruption that they get away with because they are the ones who write the laws. Some politicians have tried to change that, but BOTH Partys have prevented it.
Trump will probably get no more then a slap on the wrist for withholding the classified documents - unless it's proven that he gave classified information to foreign agents.
But in the Georgia & 2020 election cases, he's screwed. He'll go to prison for those.
There's no way Trump will be elected. The 14th amendment will prevent it. Don't count on SCOTUS to save him. Somehow, SCOTUS Justices have the strange idea that they've obtained their position because of years of hard work, not because some politician nominated them. They know Trump NEEDED to nominate Conservative Justices. He was doing them no favors.
Even if he runs, which is extremely doubtful, Biden will slaughter him. There are 81Mil+ Americans that are mad about how Trump tried to steal the 2020 election form him, and millions who'll never vote for rump because of J6.
Even the Koch Family knows this.