Yes, it’s true that Game 6 of the Western Conference finals is a must win only for the St. Louis Blues.
But the Sharks would be well advised to take care of business Wednesday night and not let the issue drag into a Game 7. Besides the obvious - anything can happen in one game, the game will be played in St. Louis, etc. - there’s bad mojo associated with Game 6 losses:
2002
The Giants had a 3--2 lead in the World Series and a 5-0 lead in the seventh inning of Game 6 when the walls fell in.