You have to be a little irrational to get what you want. If you’re too practical, you may curb your chances from the start.
The whole point is to at least give the moon at least a shot, not because you’ll achieve exactly to your wishes but because you’ll be motivated to keep pushing forward.
Playing in the NBA is a pipe dream for most of us. But by playing basketball you may acquire the leadership and motivation to move on to coaching or take what you learned and apply it to something else like another sport, job, or side project.
The whole point is to build up enough confidence to take action, to persist a little bit, but also to identify your strengths and see new opportunities. Your job is to find the gaps and build up the courage to fill them in.
You have to be somewhat unrealistic to give anything a go; otherwise, you’ll hesitate and hold back. You’re just shooting to make a point to yourself that anything is possible if you believe in the unbelievable.