Nobody is disagreeing with the importance of a shutdown line. You're just exaggerating how good the Jammer line is. Is it a decent line that can be effective? Sure. Is it the best line in all of college hockey? No, not even close.
But we're not talking about the heavy line right now? Unless you're comparing this Jammer line with a line that has had all three members of it play in the NHL.
They have a combined 24 points in 17 games. That's not creating offense on a regular basis. They're also a combined -6 on the season.
Is it a good line? Sure. Is it the best line in college hockey? No.