"working your way up"Watch
It's sometimes possible to skip levels if you're a natural, of course. But I do think proving oneself is important, particularly as staff will not follow someone who can't lead.
No degree can teach anyone how to manage people, it's something people can usually either do, or can't do, and requires experience and innate ability rather than qualifications. A degree might be helpful for other roles, but managerial ones in sensible companies are usually held by those who have proved themselves either with that company or elsewhere.
Qualifications don't automatically make you the best choice.