I think it speaks to a lack of imagination that -that- is the only concievable future you see for both this administration and opposition politicking.
Harris lost on the Economy, despite it being relatively okay in comparison to our peers, and only by narrow margains that have allowed downballot Dems to pick up or secure seats from Republican Opponents. This was a mandate against the Establishment, not Democrats, and if Trump gleefully fucks everything up to a degree that cannot be ignored, then there's a very easy campaign to run against his successor.
Not that Dems -cannot- fuck it up, mind, but it's utterly foolish to think the party is dead forever when both parties have recovered from far worse.