You have to step back from the whole concept surrounding wireless communications, and really weigh the fundamental principles at work to consider the realities of the universe we inhabit, which is totally weird and doesn't at all stand up to ideas one might consider "normal" or reasonable.

The idea of wireless communication is only just a little bit more glamorous, because it's really the only thing that will assist humanity as part of space travel. And because we know light signals have pretty high fidelity across vast distances of (mostly) empty space.

But, solid state conductors, even if not purely contiguous due to repeaters and amplifiers, still seem pretty rational, when you start to think about what conductive transmission mediums actually do, especially as compared to emission filaments and diodes as broadcast signal sources.