to play devil's advocate - we all agree this tournament is a disgrace, but do we need to overstate just how weakened canada and usa are by this format? They have essentially the same teams they'd otherwise have, right? Give or take one player, maybe two. An injury or a "don't feel like it" would have the same effect on either team and lord knows there are always a handful of those.
I understand that. Injuries and refusals happen, as we see already in this tournament or in any other tournament. This tournament has a structure that doesn't allow Canada or USA to select all of their best players though, which is different. We know that USA wanted Eichel, as per their GM's request to the NHL, and we can speculate on others like Gaudreau and Saad. Canada likely wanted McDavid, probably not any others but who knows. Possibly more significant is that these Canadian and American players can play against their supposed national teams. If Canada or USA loses to a team half composed of its own players... what exactly does that show?
Consider other actual best on best tournaments. If they were played under this format, there is no doubt that some of the results would be different. Players Canada would miss under this format:
1976 Canada Cup - Potvin, Gainey, Gare, McDonald
1981 Canada Cup - Gretzky, Bourque, Hartsburg, Linseman, Reinhart
1984 Canada Cup - Gretzky, Bourque, Anderson, Coffey, Messier, Sutter, Fuhr, Yzerman
1987 Canada Cup - Mario Lemieux, Dineen, Hextall, Claude Lemieux, Tocchet
1991 Canada Cup - Dejardins, Fleury, Lindros, Shanahan
1996 World Cup - Lindros, Niedermayer, Jovanovski
1998 Olympics - Pronger
2002 Olympics - Brewer, Gagne
2004 World Cup - Heatley
2006 Olympics - Nash, Bouwmeester
2010 Olympics - Crosby, Doughty, Toews
2014 Olympics - Tavares, Duchene
The format is just too different to count.