I think Paxi_R6 has hit the nail on the head re uni being about CV building and life skills.
I don't know what the exact statistics are, but most people go into jobs unrelated to their degree subject (I know someone with a history of art degree who went into finance!). What most employers look for would be a reasonably good result, in a robust degree, from a good university.
I would choose whichever subject interests you the most; you'll enjoy yourself better and in all likelihood, achieve a better result.
I would whole heartedly recommend uni if you can afford both uni and flight training. It'll be the 3 most fun years of your life and the benefits, both professional and personal, will stay with you for the rest of your life.