But that's the point. They stagger the games because otherwise, as was the case a few years ago, there won't be enough channels to simultaneously put them on. Remember (I keep saying this but people don't get it), hockey is at the BOTTOM of the totem pole. They have lacrosse, women's basketball, track and field. If you have four semi-finals at the same time, you're only going to have two on TV and then the fans of the other four teams will be SCREAMING. It's not about ratings (the ratings probably don't even register), it's about capacity.
Not sure where you live, but travel someplace away from the "hotbed" college hockey areas during the NCAA playoffs (when men's and women's basketball, water polo, lacrosse is on). Go into a bar and ask them to put on the "college hockey game." They'll look at you like you have six heads and then ignore you.