Aerodynamics is a hard, applied science. It's highly testable and absolutely falsifiable.

Cosmology is a lot of bullshit. Which should not be conflated with astronomy. The big bang is a creation myth. Admittedly one I was taught in school and I guess maybe I kind of took it seriously for a little while but no not really. When you actually look into the history of it and you see all the bullshit and all the special tuning and fine-tuning that they do to try to make it work... And it still doesn't work. Tensions abound. Catastrophes are another problem. I'm sure you've heard of the crisis in cosmology? Seems like come out with one of those at least once a month.

Once you actually delve into the subject matter you realize it's a lot of interpretations a lot of frameworks that reinforce themselves. But their foundations are flimsy as air.

For instance some people believe in dark matter or dark energy. I don't believe in cosmic inflation and I think we have a dark gravity problem where we don't understand gravity but if you use a bad model for gravity then you get other aberrations, like the aforementioned dark whatever.

Take the CMB. Cosmic microwave background. Is that really seeing the edges of the observable universe? Some sort of big bang remnant? Or is it much more likely it's a collective noise from here to there collectively and it has a lot more to do with the locality rather than some far off edge of the observable universe or big bang remnant. So that's one bullshit base of the tower that's the foundation. If you take that out the rest of it collapses.