Because its what makes the most sense. I would rather see Fowler, but Primeau has earned it.
He was the best goalie in the ahl and was a big reason for Laval having the record they had. He deserves this opportunity far more than Fowler.
There is more to this than just who has a future or not with the habs. You're messing with the team morale at the worst possible time by not using Primeau. How is Pascale suppose to explain to Primeau and the players in the room that they will be using a rookie goalie over the best goalie in the ahl for the playoffs because one has a future with the habs and the other probably not? Primeau, also obviously, gives them a better chance at winning than Fowler.
The people stating that Fowler shouldve started game 3 and be the default starting goalie because of how he played game 1 and 2 would've been singing a completely different tune if the roles were reversed (Fowler was the best goalie in the ahl, and Primeau played game 1 and 2).
Fyi I've been saying it made most sense for Primeau to be starter for the playoffs way before the coaching made the decision, so it got nothing to do with defending the organization.
Also wouldn't be surprised if they end up doing a rotation of goalies.