Energy security, not propping up authoritarian regimes with terrible human rights records, not requiring military interventions to protect a stable supply of oil.
Maybe not good enough reasons to change the balance, but reasons nonetheless.
Obviously, you're right long-term but it's a slow transition not a switch we can flip.
And trains lend themselves much better to slow declining transition than a new pipeline. Can be used for other cargo; are a bit more expensive so they are a mild financial disincentive; the contaminated material (tanker cars) are by definition mobile and therefore easier to deal with at EOL.
The problem there is if you need to do it quickly: if the SUV/truck trend hadn’t caught on, for example, fleet economy wouldn’t have reversed the improvements we saw in the 80s and early 90s. The longer we wait, the harder that gradual transition will be.
People keep saying that Alberta needs to diversify as though this is some sort of epiphany that the province refuses to have, but it honestly just reveals the ignorance of the person making that claim regarding the current economic state of Canadian provinces.
They aren't diversified enough.
Alberta seems to be expecting this oil thing to keep the province going forever; it is over. Diversify, try new things, for your sake and the sake of the rest of Canada. Please stop expecting this to get better. 2015 was a warning, it's now officially ending and the time to start moving on has passed, every day not diversifying the economy of Alberta is just a day of economic procrastination.
Edit: Sure energy security, keep some for us, but let's not make it the backbone of our economy.