A degree can help in a few ways; One, it helps your credentials, which is a fairly superficial reason for getting a degree but a reason nonetheless. Two, it will give you the knowhow to do things that chances are you will not learn outside of school, this is a fairly obvious reason. Three, not so much the degree itself but the way you are forced to think in university is perhaps the biggest advantage a degree will give you. A cliched way of putting it is, highschool teaches you what to think, University teaches you how to think.
Try not to think about it as just getting a piece of paper, because once you get to university (if you do in fact go) you‘ll find that it is much less about the degree and credentials, but about the new "outside of the box" thinking you‘ll hopefully develop.
Plus, I can think of people I know who are dying to get into a criminology program (anywhere they can) don‘t look a gift horse in the mouth! Go for at least your first year then decide.
Of course take any free advice with a grain of salt, it‘s up to yourself in the end, but definetly don‘t think that going to university isn‘t worth it just because you don‘t plan on being an officer, etc.
Edit- I should add of course that‘s not to say that a person who doesnt go to university isn‘t capable of thinking, many very intelligent people just don‘t fit the mold of a university student and they turn out fine, if not, better than a student would.
It‘s a case by case situation, you just need to figure out if you are a university kind of student or another kind of learner. The fact that you applied and got accepted, suggests that you probably would benefit more from a university environment than from another form.