That’s a great analogy. The assassination caused a military fight that wouldn’t have happened otherwise, but the conflicting alliances and leaders itching to use their new military power would have caused a major war anyway. The spark didn’t matter as much as the real systemic issues, but for a layman it’s a good enough cause.

Something would have popped the bubble, and I’d argue the real cause of the start of the downturn was OPEC and the bottom falling out of the oil market. Then COVID set in and made things a million times worse, making a quick recovery nearly impossible. That’s what will be remembered by lay people, while experts will hopefully remember you can only pop a bubble if there is a bubble to be popped. And OPEC/COVID didn’t create the bubble, they just popped it.