You see, the “problem” with the pipeline is its “upside”.
And they don’t even mention 50 years of oil as one of the upsides. Note this is now not to stop the pipeline but to stop oil itself.
Saudi Arabia 250 Billion Barrels
Canada 3 Trillion Barrels (mostly oil sands)
Canada has 12 times more oil deposits than Saudi Arabia. More like a few centuries supply than a few decades. There will be pipelines built to carry this oil south, west to the Pacific, and perhaps even east to Hudson Bay. The only question is when and which ones come first.