But this is the Olympics, where the rosters are essentially dream teams in comparison to NHL rosters, so I agree that Babcock's impact on Canada's success was probably minimal. The talent on the roster was insane, and would probably have played well with any coach behind that bench. Hell, Ron Wilson took team USA to the gold medal game in 2010. But it varies. Some teams need the influence of a coach more than other teams.
But in the NHL, the role of the coach is far more important than in the Olympics. There is more competition, the rosters aren't as stacked, and teams need more direction and an identity to succeed throughout a 9 month season.
It's never a case where it's just 100% credit to the coach, or 100% credit to the players. You need a combination of a good coach with a good system that amplifies the skill of the players. For instance St. Louis is one of the best cycle teams in the league and one of the best defensive teams in the league. The players deserve credit for being able to execute and succeed under this brand of hockey, but the coach deserves credit for implementing a system that maximizes the team potential, and that works for a certain group of players.