No one is arguing that fuel prices was not the final nail in the Spirit coffin. Obviously that tipped them over the (tenuous and teetering) edge. If it wasn’t fuel prices, it would very likely have been something else in the near term.
But to pretend that Spirit is some kind of bellwether and confirmation of early predictions of “Black Swan!” and “industry furloughs are imminent!” is massively disingenuous. And, I would argue reveals some genuine bias and/or willful ignorance.