omarhs
I would offer an alternative thought to the above: Having been an interested observer of the airline hiring game a bit over the decades, I've seen that airlines (and can only assume other organizations that employ pilots) are quite interested in one's extracurricular activities and interests. The espoused concept is that a well-rounded person makes a better employee which is apparently demonstrated by a person with varied interests...even going so far as one's volunteer activities. I'd guess that non-US career destination airlines are at least similar.
For a young person crafting that first resume following flight training, this just might be very useful to differentiate himself from the herd. Of course, many airlines have their own dedicated application form which might obviate the need for a resume but you should certainly have one. Good luck in your career.
Others will set me straight if I'm wrong about this.