I'm not sure I understand what you're saying.
You realize that there is some profit derived by the refiner--why shouldn't it be in the U. S.? And, there's a pretty good transportation infrastructure centered around Oklahoma. Isn't that more centrally located than the Canadian field for distribution around the U. S.? And why build refineries up there if they exist here?
Now, if my assumptions are wrong, and the pipeline will cause some problems, tell me about it, and I'll reconsider my take on the situation.
I think it’s more an issue of where the refineries are, and the difficulty in getting any new refineries built.