TFC07, unless they have European grandparents, they can't just go play in Europe. Canada isn't ranked highly enough to get them in on appeal permits, either. The vast majority of kids have to stay in N. America. ANd most that do go to Europe as unpaid youth players when younger get cut at 18 because only the top 1% of non-domestic youth players moves on to a senior team, due to almost every country having nationality based roster restrictions.
On top of that, scouting is not nearly as absolute as people think; Canada isn't scouted heavily, because we have a small, disparate population and it's winter seven months of the year. These kids are only usually seen if someone happens to like their tape, or their youth coach arranges something through someone he knows.
It's not what you think it is.