The problem with string theory, is that instead of noticing that the math no longer describes reality,, we are assured that the math is correct, and that there are magic invisible universes and worlds.
Which is more plausible,, the lunacy of string theory, taken as a representation of reality?? Or that the math somewhere took a turn off the path of truth?
It’s happened before,,so many deep errors in describing reality had entire bodies of “proof”.
Why should it be surprising that math can describe things that don’t or even can’t exist? We can do that with words. What is amazing is that math can be used to describe things that do exist, whether they are near or very, very far.