The vast majority of employed people are not doing "what they wanted to do when they grow up", and quite many are doing jobs they didn't even know existed.
I wanted to be a Ninja Turtle for quite some time when I was growing up, so I really don't know how much emphasis we should be placing on "what do you want to be when you grow up" anyways.
In case anyone is wondering, I didn't become a Ninja Turtle.