“If our understanding of physics is correct interstellar travel is basically impossible.”
Actually, it might surprise you to know that physics has advanced since 1925. It surprises me that in 2023 any intelligent person exists who isn’t familiar with the Einstein-Rosen bridge work and similar constructs, all operating consistent with the laws of physics and logic.
I have a slight understanding of wormholes but was under the impression that the energy needed to construct such an object would be something that even a class II civilization would have difficulty doing.