We never had any problems with son knowing what he wanted to be when he grew up.
At 4, it was a Hurricane (Miami), around 8, it was an Atlanta Brave. That lasted a few years until he wanted to be the next David Copperfield. Seriously, he was pretty good, put on productions in our garage for everyone in the neighborhood. Then street hockey took over so he thought about becoming a Florida Panther. Also around 13 he was seriously considering becoming a pro baller. At one point, golf was a serious consideration. Hours and hours playing the 9 hole course over and over.
He attended a 3 year middle school that included pre engineering. It wasn't so much about that, small classes and besides the required curiculum, a lot of real life skills. Somehow he managed to win a week long opportunity at Surf camp. So that was a consideration for a little while 
. Understand that baseball was not played year round as son was growing up. It gave him an opportunity to explore a lot of other opportunities.
All through that he never stopped loving baseball. My husband had taken him year after year to many spring training games. It never got old. The desire was to find the best program that would have a good baseball program and good options for a degree. Scouts didnt start coming around until junior, senior seasons and summer.
Seriously folks, times have changed but don't ever let your kids stop dreaming. By the time they reach HS, most of them pretty much know what they want to do. They may need your help in sorting out the process, and that's ok.
Happy Monday everyone!