Is Relativity Theory the new "Flat Earth"?

People like structure. They like a sense of fixed limits. That's why "theory" is so attractive to people. The notion that we exist in an empirical universe in which we never can really know for sure what is going to happen next is very disturbing to most people. Is that why so many people find that idea that nothing can possibly travel faster than light so appealing? Of course, physicists can produce laboratory particle accelerator experiments consistent with Relativity, but, these could be artifactual. There are some microeffects in space, but, very small effects are notably untrustworthy. The fact is, Relativity is based on the very simple fact that the electromagnetic spectrum, as we understand it, doesn't include particle or wave forms that go faster than light. It assumes we already know everything there is to know about such waveforms. And, postulated abstractions about "space-time" don't really add any new information, or provide any additional evidence. Actually, this is quite a bit like the idea that the earth was flat. And, even now, you can find plenty of evidence for this, if you really want to! The real problem here, is that we now know that there are innumerable earth-like planets that would be quite accessible to nuclear powered spacecraft that probably could be developed. Assuming, of course, that we don't run into that big, bad, nasty light speed limit, that is! Because, everyone knows, you can't travel faster than light. You'd fall off the edge of the earth, right?