It's because they don't want to drive. It's a long trip. Since they receive offers of employment from everywhere, they simply choose other regions.
People used to travel to the regions by airplane. It was like going on a vacation. They came to enjoy the St. Lawrence River. Today, when they're asked to drive for seven hours to get to the region they simply refuse to provide services or courses, or even medical care. Consequently, patients have to be transported from the region to the major centres. Ultimately, those trips are very expensive. We have fewer services in the region as a result.