the purported event is separated from the Iranian revolution by several decades (53 to 79)
I think the parent was implying that the '53 coup was what the Western powers wanted, but the '79 revolution destroyed that plan.
You are repeating a standard, oversimplified revisionist history which makes the US singlehandedly responsible for Iran's entire fate for all time, blatantly ignoring any other historical, regional or Iranian factor.
I'm not entirely sure, but I think you are misreading what people are saying here (it isn't exactly clear what they are saying, so I might be wrong too).
I think they are saying that the '79 revolution was an Iranian action, which happened in direct opposition to what the Western powers wanted.
In either case, I agree with you about the '79 revolution - that was completely Iranian doing.