I don't think anything in theoretical physics is well-settled fact.

Edit:

After a century of observations and theoretical advances, cosmologists can confidently state that the universe is infinite—or perhaps not. The question remains deeply complex. Current evidence suggests our expanding universe lacks both a center and edge, with the Big Bang occurring everywhere simultaneously rather than from a single point. Recent cosmic microwave background measurements indicate nearly flat geometry, supporting infinite extent theories, though alternative models proposing finite, curved space remain possible.

Yeah, nothing about that says "well-settled fact." Quite the opposite. Either what you said is disinfo or you need to check your reading comprehension.