With all of the "Scientific Proofs" that have fallen to the wayside over the past hundreds of years, how can you say with absolute certainty that these people are not simply mistaken?
I agree that numerous, presupposed scientific theories were subsequently disproved at a later period in time, but that's precisely how science works, and precisely why its 21st-century tenets are so accurate. We've spoken about the classic example of "phlogiston" before as an example.
Science begins with a hypothesis, which is replicated and tested exhaustively. If it' snot falsified, then it becomes a theory (such as electromagnetism or gravity or hydraulics).
I'd say all these pilots and flight controllers aren't collectively mistaken about basic flight paths, navigational instrumentation, electronics, trigonometry, radar vectoring and geography simply because the odds would have to be—literally—in the billions to one ratio. There are currently more than 617,000 registered pilots in the US, and more than 15,000 air traffic controllers in the US.
Could they all be misinformed without realising it? I don't think so.