That's hard to imagine. Just because it didn't happen in a vacuum doesn't meant "it would never have happened unless exactly these circumstances had existed", which is what I'm saying.
One could similarly claim that the German reunification resulted in Russia invading Ukraine, but it's obviously not a direct consequence, and over 30 years lots of things are happening, and things are dynamic, so the "if this then that" line gets weaker with each year that passes. Otherwise we end up with "Cain slaying Abel resulted in cell phones".
No, saying something isn't "reasonable to assume" doesn't mean it cannot ever happen. It's hard to prove an hypothetical wouldn't have happened.
I meant that it's unreasonable to suppose the Islamic Revolution would have happened without first the coup (by the West) and then the continued Western support of a tyrannical dictatorship, which gave support to the Islamic revolutionaries that the West was "the devil".
Had Iran had a stable, less tyrannical government for decades, support for a Islamic revolution would have been much, much lower.
Would it have been impossible? No. Would it have been much less likely? Sure.
There were 25 years between those two events though, so it's hard to draw a direct line. It's perfectly reasonable to assume that the Islamic Revolution would've happened even without the 1953 coup d'état and the economic growth that followed it.