I'm not sure why it is you think that being in the leadership circle will ensure their future happiness. You don't need to be a leader to be happy- you only need to do what you truly love.
For some, that means being a doctor or nurse, for others, an artist or musician. If someone has a passion for cooking, they probably won't be as happy being a manager in some corporation as they would being a chef.
My DH became a nurse because he truly loves to help people. (He was inspired after going on a medical mission to Bosnia) Anyway,he was really good at advocating for his patients. He loved going to work every day and making a difference in people's lives. He was given the clinical leader position because he's passionate and a very good nurse. He then got a position as clinical manager, and then nursing director. Now that he's in management (or I guess you could say, a leadership position), while there are things he likes about his job- and he's very dedicated, he's not as happy as he was when he was working with patients. Being stuck in one meeting after another while he has tons of other things to do, is not quite as fulfilling to him as caring for someone who is seriously ill. BTW- he was never in a leadership circle in middle school- or even high school.
I'm a SAHM, and I couldn't imagine being happier doing something else. It's what I've always wanted to do. I went to college, then taught high school Spanish for 2 years, but I didn't enjoy it nearly as much.
I think the best thing we can do as moms is to encourage our children to keep learning about the things they are most interested in, while introducing them to new experiences so they have the opportunity to develop new passions. Who knows where that will lead :)