Falsifiability for a theory is great, but a theory can still be respectable even if it is not falsifiable, as long as it is verifiable.

I'd say many features of string theory don't mesh with what we observe in everyday life.

I do feel strongly that string theory is our best hope for making progress at unifying gravity and quantum mechanics.

I can assure you that no string theorist would be interested in working on string theory if it were somehow permanently beyond testability. That would no longer be doing science.

String theory envisions a multiverse in which our universe is one slice of bread in a big cosmic loaf. The other slices would be displaced from ours in some extra dimension of space.

If the theory turns out to be right, that will be tremendously thick and tasty icing on the cake.