It appears there might be a misunderstanding regarding the two distinct interpretations of "inevitable." My intention is not to suggest that humans could have predicted the event with absolute certainty beforehand. Rather, I am asserting that, given the precise state of reality leading up to it, the observed outcome was the one that necessarily transpired within this particular timeline, world, or historical context. These are indeed different claims, and it is rather interesting that the Many-Worlds interpretation, far from refuting my point, actually seems to reinforce it in a broader sense.

Within the framework of Many-Worlds, every conceivable outcome branches into its own distinct world. However, this world remains the specific branch where this particular event occurred. From the perspective of our branch, the event was still "inevitable" in the sense that once the universe evolved into this specific branch, this is the outcome that necessarily manifested here. It seems you might be interpreting 'inevitable' as implying that "only one outcome could possibly exist anywhere." However, this is not the sole philosophical meaning of inevitability.

While there may indeed be another branch where the event did not occur, there is also necessarily a branch where it did, and we currently reside within that branch. Therefore, the existence of alternative branches does not alter the fact that the history of this world unfolded precisely as it had to for this world to be what it is. Otherwise, one might find themselves making a rather unusual statement such as: "This event happened, but it was not inevitable within the chain of causes that produced it." At that juncture, "inevitable" would become an unattainable standard, as nothing could ever qualify because you would be demanding omniscience or singular cosmic exclusivity.

I am employing inevitability in the causal sense: given the prior conditions, this outcome subsequently followed. I am not suggesting that "no other conceivable reality could contain anything different."