What if I were able to go back to my late teens and face the dilemma of picking a profession anew?

This is a flawed question and I’m baffled how most people can’t see this basic flaw.

If I would go back 40 years (or 30, or 25, or 20 — doesn’t matter; the idea, as I understand it, to go back to one’s late teenage years when people are supposed to pick something they’ll do in adulthood) it would mean that I would be the same person I was. I wouldn’t be any different. The whole scenario / picture wouldn’t be any different. I would have the same thoughts, mindset…