There is no doubt much to be gained from some time spent away from home. I'm not going to wax poetic on the obvious. What I will do is share the story of three brothers that helped me look at this issue on a human level.
But bring they did! Jon and Ryan found their way back to the Maritimes and brought their Ontario girlfriends too. That's a cunning population growth strategy right there :P Here, I've become friends with the youngest O'Kane, Joey, who has not yet moved away. I say yet, because it's clear that he would value the opportunity to learn at the epicentre of his trade, but I get the impression that Joey wouldn't mind coming home in the end.
But what if he didn't? What happens if the young people leave and they realize they love the big city so much and are so successful elsewhere that they don't come home? In reference to his older brother who is partial to life in Toronto, Jon has an answer to that: good! If young people do well and find happiness in the big city, great!
I'll offer more discussion on this concept later. Here's the video.