Obviously you’re right. That said, in the universe of Trump’s fiction, it tracks (kind of). If the machines were rigged and if the election was stolen, then several things logically follow:
Trump’s actions to retain power were not only justified, but also imperative, and very much within the scope of his duties as president, since he’s the executive branch; while DOJ might normally handle the day to day, a stolen election is a big deal, and it makes sense he would step in. And therefore he would be immune to prosecution for any “law breaking.”
If you’re a superhero cop - not an actual, fat ass fascist bastard cop we have irl, but the kind of cop TV says is what cops are like, you don’t have time for subpoenas and warrants – you break down the doors and you grab the evidence. Maybe you’re not even sure if there’s a crime, but you can’t risk it – and if you’re president, you can argue there’s room for “better to ask for forgiveness than permission” in that context.
If you’re not sure whether there’s been a crime but there’s a massive time pressure and extremely high stakes (as would be the case if the election was actually stolen), you would need to act as if there was a crime, since the consequences if there isn’t pale in comparison to the consequences if there is. So: if you are the head of the executive branch, and you are concerned that there’s a crime of that magnitude, you could easily make the case that you are duty bound to investigate.
So, the situation is this: if you investigate, and there’s a crime, you’ve saved the world; if you investigate and there is no crime, then you will go to jail for it. That’s a bit unfair – so, a warning that, if you investigate this and there’s no crime, then you’re going to jail, might’ve been called for.
So – if Trump was able to produce even a single piece of evidence to support his claims, the fiction he’s established on top of them is arguable, and, if you start to look at his cases through that lens, his absurd motions and arguments kind of make sense.