That's 7 out of 10 people.
Why is that?
I believe it has something to do with when they were kids. They had an ambition, or dream, or belief, and someone said... "Oh no, no, no... you can't do THAT."
It happened to me.
I wanted to be a professional basketball player, and I heard it over, and over, and over again, from SO many people that there was not a chance that I could EVER do that. It pushed me even more to want to accomplish it. You... reading this, are probably thinking the same thing! ("Boy, he probably NEVER could have been a professional basketball player... that's crazy!")
We can BE whatever we want to be, as long as we put our mind to it, learn about how to do whatever it is, and are realistic about the strengths that will put us into that position.
Now, as a teacher, putting students into "jobs" into our classroom, I see it all the time. They are engaged. They are learning. They want to do good for others. They are happy.
I definitely try NOT to give a pre-conceived notion that they can not do a job.
So when a student says that they want to be something when they grow up, whether it be a teacher, a baseball player, or even President of the United States... I say, "Good. Go for it. You can certainly be whatever you want to be, as long as you work hard, and are realistic about your goals."
Hopefully, that 70% number comes down a little bit in the future...