Since you're making up scenarios let's make up another.
Imagine Canada is up by 1 goal, and one of the top 6 get injured. who would you rather have protecting that lead. Hamhuis or PK?
Before anyone jumps to conclusions I am not saying PK cannot be responsible defensively, but there are more secure options on this team
Subban...
He has proved in the past under Martin that when asked to play a pure shutdown role, he will do that.
Under Therrien he plays more risky then he did under Martin because he is used in a more offensive role under Therrien.
With Martin, Subban was top 2 on the team in SH/TOI in both season, even tho having the most PIM on a pk unit that ranked 7th best and 2nd best in the league in those years.
But anyways who cares, about that, if you paid attention to what team Canada's managment and coaches have been saying, the REAL reason why Hamuis is dressed instead of Subban is because none of Doughty, Weber or AP have every played LD in the NHL, and out of the lefty's Jay Bouw has played RD in the NHL.
So if a RD is hurt, they can slid Bouw to RD and have Hamuis play LD.
But if Subban is on in, and Hamuis isn't, if a LD is hurt, none of Subban, AP, Doughty, or Weber have played LD.
IMO its not the smartest idea to have, because I think guys like Subban, and Doughty and AP are great puck handlers and skaters where they would be able to play their offside, the USA proved that by having Ryan McDonaugh play his offside so that he can be on the top pairing, and he has never played RD before now, and he was one of the USA best Dmen.