So what, then, is this movie suggesting?

Rating: 7/10 (28 June 2019)

We go through most of this movie believing that in the alternate universe into which the protagonist stumbles the Beatles never existed. Then, near the end, we discover that indeed they did, to the extent that their songs were written and performed in Liverpool.
What are we to make of that? That it was only chance that made the Beatles a hit, and that they could have written the same material and still gone nowhere?
I have no answer. The movie doesn't offer one.
I much enjoyed this movie. But I wish the end had reflected at least a little on the question it raises.