Not every person in the stands can get excited by things like "Oh my gosh, did you see the awesome fore-checking from the fourth line!!??!!" "Holy cow, can you believe how they progressed through that 1-3-1 trap??!!??"
I don't know much about hockey. I was never exposed to it growing up. I found it as a college freshman at Northern Michigan University when (during orientation week) they said "hey, come on over to our brand new hockey arena and pick your seats. You can put the bill on your student account, so you don't really have to pay for anything!". I started going to games and picked up the basics...what the typical penalties are, along with the concepts of offsides and icing...and went about my business watching and enjoying the game from a 5000' level.
I think that too often the fans on this board tend to be a bit elitist. The majority of the fans at UW games are watching from that 5000' level (and not just because they got the cheap seats in the 300 ring). They can sense the general flow of the game, they get excited with consistent offensive zone pressure, they cheer/boo when the video screen bounces back and forth with guys in the penalty boxes, they count along when Phil prompts them to. They are very reactive fans. If someone does something to get them excited, they get excited; if there isn't anything prompting them to get excited, they will sit there quietly and watch the game with limited reaction unless something happens.
You can call the crowd useless, but that isn't going to change the nature of the fanbase in Wisconsin. It would be great if there was constantly exciting play that kept the fans excited and engaged, but when that isn't happening it falls back on the athletic department via their gameday staff to help provide the energy. And sometimes a well-timed and high-energy hit through the PA can do that.