I read somewhere that the bulk of Trudeau's trust fund is in SNC-Lavalin shares. I haven't been able to confirm or deny that information. But it makes sense to me - why he is more concerned about 9,000 SNC-Lavalin jobs in Quebec than 40,000 lost jobs in Alberta that don't affect his trust fund in any way.
He cares more because 1. Quebec votes much more Liberal than Alberta, and has a big population of votes/MP's, 2. There was a Quebec election around the time, 3. Trudeau is from Quebec and is a Quebec MP(a more minor consideration than the first 2).
I think he still does care about AB jobs though. I mean he did have the gov buy the pipeline and try to push it through, but was quashed by the courts.