They might be, anyway. Do you really think Trump will relinquish power to anyone, no matter what kind of opposing landslide he sees? I do not doubt he’ll try to use something like emergency powers to interdict Biden’s accession.
I know there’s the matter of whether he can impel the rest of the world to see him as legitimate (and the United States is a major economic factor, so embargoes might not be much fun for even the ones inflicting it). But the best-case scenario for either result that I see is the nation fragmenting. And even that might not thwart civil war.