I find my Philosphy degree incredibly relevant in these turbulent and often confusing times.
A degree isn't at all vital to a flying career. I fly with lots of thickies who manage with basic maths and English and they are quite capable pilots.
However, you would be mad to throw away the opportunity of finishing a good quality degree. Enjoy your student days, flying will still be there at the end. There's no rush to getting started building hours if you're only in your early twenties.