At 16 I was into science and computers (the Apple Mac was brand new back then) as well as loving playing trumpet (and euphonium) with my village band. A music career in that country meant leading a fairly impoverished life I was told, so I focused on engineering in uni. I did put my name down for the uni's music degree course but wasn't accepted into that due to my lack of formal music training before then, so as a backup plan that wouldn't have worked. My realistic backup would have been to head overseas to study or work in the UK. Engineering took me to mainland Europe where I made hay for a few years then a fabulous young lady took me to Australia where I discovered the engineering I did was mainly done in other countries, so my next backup - IT/software - kicked in. I'm not sure I would ever have made it as a pro trumpet player, either financially or in terms of skill, but I'm always trying to improve the latter. Oddly enough perhaps, my IT job led me to one of the greatest band experiences I ever had, so you never know I suppose.
(Aside - I sometimes feel bad that I've got an excellent pro trumpet (or two) because I could afford them, but some of the really good trumpeters I encounter at festivals or shows have only what look like old beaten up horns because I think they can't afford something else.)