Nope. Must be their bad conscience, I guess.
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Since they sabotage all other forms of international hockey in favor of their beloved domestic league, they at least try to make a big deal out of a juniors tournament – a bagatelle in nearly everyone else's estimation. And they partially sabotage that, too: the very best players aren't allowed to participate if they're needed in the domestic league. It is what it is – Canada invented the game and I suppose they must be allowed to butcher its international scene in any way they choose.
Oh, and who knows if the juniors tourney interested anyone in Canada, either, if it hadn't been for the Cold War and Don Cherry who, decades ago, nationalistically, in a Trumpian way, made a big deal out of the embarrassement that was the "Punchup in Piešťany" right here in Slovakia. What should have been a source of disgrace, became a source of (substitute) pride for Canada, and it may be at the root of the popularity of the juniors tourney there.
Since Canadians (apart from a few Olympic episodes) can't really celebrate any achievements in international hockey, due to their refusing to fully participate in its events, they must celebrate them by proxy – such as through Canadian stars on US teams (or vice versa, although that's rare), or this substitute passion of a juniors tournament.
(Funnily enough, in this, Canadian hockey fans are reduced to the role of hockey fans from smaller hockey nations like Slovakia: unable to enjoy success at home, they at least cheer on Canadian superstars playing on US teams. It's weird what commercialism of sports can ultimately do to you.)