That's primarily because it's only recently that Canada has started to turn its attention towards potentially moving product off the east coast, as opposed to the more traditional focus of moving oil and gas either south into the United States, within the continental market, or a fairly big push to move it eastwards into East Asia, which is a very lucrative market.
Ce n'est que depuis peu que le Canada envisage d'exporter ses produits à partir de la côte Est, ayant préféré par le passé d'exporter son pétrole et son gaz aux États-Unis, sur le marché continental, ou vers l'Asie orientale, un marché très lucratif qui mobilise les parties prenantes.