Design, medicine, and business are quite different fields.
If your heart is in it for the money and the long term financial gains, then medicine and business certainly come out ahead (once you factor in paying off 7 years of med school debt).
But if you are passionate about design there are plenty of designers who have made great long term careers out of design and while we’ll never hit the same tax bracket as the folks on Wall St. it’s an extremely engaging, hands on and fun career path. The reason most of us spent our childhoods building stuff is because we love building stuff, design lets you do that and make enough money to have a good life.
There are a lot of branches that you can take an ID degree. My friends and former classmates have done everything from graphic design, web design, product design, User Experience, teaching, though some just shifted out of the field entirely.