[observationist]

With anything cosmological, what we can do is make predictions, and find interesting things the universe does when our predictions fail. Those failures often cascade back into practical outcomes here on earth.

Think of generations of scientists observing orbits, painstakingly recording their measurements by hand, building books of tables, until finally someone was able to put it all together into a comprehensive theory that gave us the ability to predict the effects of gravity.

If we build what's supposed to be a valid model of a galaxy, but we look out and a galaxy we see violates what we expect, we have an interesting place to explore.