There is precious little difference between age and whether you attempted rebellion.
First, let me say I think he did try to stay in power. You'd have to be foolish to think otherwise.
To me the phone call to GA, the alternate electors, the admission, in public no less, they wanted to have Pence turn away the certification with ZERO evidence all points back to Trump. There's obviously more we could go into.
But there is a difference between "age" (easily definable, well mostly lol) and an "attempted rebellion" (not so easy - esp in a court of law) - esp the way Trump did it. He didn't call on the military, he thought about many different things but pulled back (assigning a new AG, confiscating voting machines, etc) and the big issue is the extent that he went to is up to interpretation of the law.
And different people (judge/jury) who make decisions have different interpretations. Rebellion to some could literally mean hand to hand combat to maintain power - while others would connect Trump's actions to pushing the envelope on vaguely written laws that give him a pass.
This is why you have impeachment. For Mitch McConnell to stand up there and rail on Trump the way he did after J6 and then not vote to impeach? It's baffling. Well, not really...these guys want to stay in power and giving Trump the pass was the easy out.
Now it's come back to haunt them.