There are, obviously, cases where you can't question the person who'd give you the answer you want. In these cases, you'll have to try answering it yourself based on the context. In my opinion, based on what I've understood from their serious attitude towards the project, I find it extremely unlikely from their side to not choose random keys as they'd never want to leave room for an impersonator.

Also, I would characterize it “unfair” to give those smartasses the chance to reward themselves in an other way than mining. It promotes nothing, but immorality. The fact that Satoshi hasn't move their coins for over a decade shows me that they didn't want them to be into circulation in the first place.