The diaspora plays a role in this. Of course, the diaspora should be seen as an important resource for Canada. It strengthens people-to-people connections and lays out networks. I see the diaspora as part of the solution, not as a primary solution.
I'll answer that through an anecdote. I teach a class on Southeast Asian politics. A good portion of my class is Canadians with Southeast Asian heritage. Typically, they know one country well culturally. Maybe they have language skills for one country. Often, they have not been to the region at all, or if they have, they've been to that one country. It's a large region.
I think the diasporic connections, while they're important, do not replace systematic training across the board.