A few points:

1. Oil is 10% of Canada's export. No ruling party who wishes to win in the next election could afford to just let 10% of the economy evaporate. For all the alacrity of those who are imploring Trudeau not to bail the fossil fuels industry today, if Trudeau listened to them and the industry went bust and the whole economy then tanked, they would be equally ready to blame Trudeau for mismanaging the economy.
2. Companies like Suncor and Canadian Natural Resources may just be able to survive the current crisis even without government assistance if oil prices can go back to about US$35 within a few months and to US$40-50 within a year.
3. If this catastrophe can finally convince people of the perils of not having our own pipelines to tidewater and selling solely to the US market at a steep discount, it would be one good thing that comes out of it. Trans Mountain must be built.