Kids have always wanted cool jobs and not uncool jobs. Before they wanted to be rock stars, movie stars or models. Kids who did wanna be scientists or whatever tended to have a very fantastical idea what those jobs are like, a lot wanna be vets until certain realities of that gig set in, same with teachers cause its one of the people you see doing their job everyday. The ones who arent nerds want glamorous media jobs. Kids have no idea what the reality of working most jobs is like, asking them what they wanna do isnt a useful way to measure anything aside from the ignorance that comes with being a kid, which I think has remained steady.
I wanted to be a caveman as a kid and when I found out thar wasn't a profession I went with Inventor cause I figured id be basically Robin Williams in Flubber