Those are excellent questions.
Even in your day, magical transport to Cald was not possible except by extraordinary means.
Transport to the other worlds was possible by lesser means, but still not easy. Basic teleport would have never sufficed. No one was ever able to teleport to the moon, and that goes for your time up until now, way it is common knowledge that no one get magically transport to the moon.
With that being the case, no one believes you can magically go any farther than the moon.