For anyone making such an argument, I would ask them to explain then, how Joe finished 4th, 5th, and a distant 2nd in the first three contests?
Left to his own devices, Biden lost miserably. It’s only after a James Clybourn endorsement in South Carolina, and an establishment consolidation around him, that Biden became the front runner.
The recent contests and the heavy media narrative have propped up Biden a great deal, and for those reasons I think his come back is rather artificial. In other words, his comeback wasn’t based on his merits as a candidate, but more so the ability of the establishment to coalesce and create an overwhelming media narrative.