Dh met dd's infant school teacher the other day and she was quite surprised that dd hadn't gone to university (she's at stage school). I don't think dh and I were in the least surprised when she opted for the performing arts, we could see that one coming.
As for ds, he never seemed very interested in anything when he was little, apart from football, which he clearly had limited talent for. He did talk about becoming a firefighter, that's about the only thing he ever said. Is now planning to look for an apprenticeship in something practical (plumber, decorator).
I knew from a very early age that I wanted to write books and learn about the past. Which is what I do as an academic. Dh was about 10 when he decided he wanted to be an archaeologist. Carried it through despite opposition from his father.
My nephew decided at 12 that he wanted to become a musician, didn't tell anyone, just started practising his instrument an hour a day, and then upped to 2 hours after a year, 3 the year after. Even when he applied to the conservatoire he was too diffident (and apprehensive of negative reactions from his father) that he just said "well, I'll try it for a year and then I can always study STEM (he lives in a country without fees and has the kind of marks that would get him in anywhere). After a year at conservatoire, and winning prizes for best student/getting incredibly prestigious year abroad, he has finally admitted that yes, he would quite like to become a musician.
I think it's difficult for ds growing up in a family where everybody else is so focused and knows exactly what they love.