I feel like the use of astronomy and cosmology to model and understand sub-microscopic processes seems a little… backwards? Frankly, I’m ignorant of both but my

I feel like the use of astronomy and cosmology to model and understand sub-microscopic processes seems a little… backwards? Frankly, I’m ignorant of both but my gut feeling tells me it’s a bit of a scientific dead end. Would love to hear why I’m wrong or if anyone else more educated than I am in this area shares the same suspicions.