Trudeau is more pragmatic than you think. 

He is betting Investors and governments hoping to get product to Asian markets with pipelines have a world of hurt coming their way with a way short a market window to payback. Far safer, far cheaper in the time available to shop the tar via rail - at least the new rail cars can be re-purposed in a collapsing market.

Another unwanted approval, BC's Site C dam is another pipeline class, white elephant, producing unneeded electricity that will never come close to paying back the capital investment. He's betting a new NDP government will shut it down.

Quietly he's supported Canada's best in the world, nuclear regulator, granting licence to 8 of the worlds Generation 4 nuke startups, like Toronto's Terrestrial Energy.

He's betting that these nukes will be available to replace coal and gas generation, long before he actually has to dump more than token cash in wind/solar/gas backup scams.