It doesn’t matter though whether Homer is a single person or many, real or fictional. What matters is that we’ve not lost the context of the story.
We literally did. We don’t know how much - if anything - written in the Homeric poems is true. If it did happen, we don’t know when, only rough estimates.
For hundreds of years those poems were thought to be an accurate retelling of history, to the point that political diatribes between ancient Greek cities could be settled by consulting the Iliad.
If our civilization falls, there’s no guarantee that our common knowledge survives. It could very well be that people see a lightsaber and think that we had the technology to build one.