They're teenagers and most of them aren't even close to ever being good enough for the NHL. Yes, there are teenagers in the NHL, but they are exceptions due to their immense talent. A CHL team has between 0-2 of those guys who could maybe hang in the NHL right now. Even those guys in the NHL as teenagers still are at a disadvantage from inferior strength and experience, which is why they don't start to enter their prime until their early 20's. Basically it'd be a team of guys currently good enough for the NHL (the NHL team) vs a team of teenagers with maybe 1 guy currently good enough for the NHL (the CHL team), 1 or 2 guys who will in the future be NHLers but aren't yet developed enough, and a few more who could maybe be NHLers if their career breaks the right way. Hockey can be a sport of luck or randomness in terms of the scoreboard, but the NHL team would be dominating possession and putting up three times as many shots at least.