I'm wondering if there were multiple Trojan Wars, the tales of which later got lumped together.
Like maybe the Greeks burned down Troy during the bronze age collapse (accounting for the 1180BCE destruction layer of Troy), when it seems like they were part of the Sea Peoples raiding places as far as Egypt.
But then they later grouped tales of that conflict with earlier bronze age battles in Anatolia, explaining the Bronze Age details in the Iliad.