Be safe
I would opt for a university degree. It's acting safe imo. As other users posted, your life as a pilot depends on your next medical and sim assessment. What happens if you fail one of those at any point in time of your job? If you have a degree, you can still work in something professionally and have a financially secure life.
I will not say university is fun, but it is memorable. I decided to further my studies to a master's degree in order to secure a decent, well paid job so as I may fund my ATPL modular training. Keep in mind that you may not be able to make it to a 'sponsored' scheme.
If law is not what you want, spend some time to reconsider what other areas in university may be of further interest, consider the oportunities available in that area and see how you feel then. True, you may 'lose out' on 3-4 years of your life that way, but if you consider their value to your life if all else fails, I assure you that you won't regret it.
My 2p.
A.O.