At this point I feel like you're going from a reasonable question about Godel's theorem to cranky person unwilling to see how any math that doesn't explain how to fly a 747 is relevant to the world.

There are huge branches of mathematics that don't find immediate practicality in physics. Often these end up being practical in cryptography or quantum mechanics, but sometimes they don't. But to dismiss the entire field that relates to the cardinality of real numbers as uninteresting if someone can't give you a practical application of it shows a simple disregard for other fields of study.

lol