Oh please.
1) It doesn't take a genius to figure out that they needed 2-2 to both go through. And it doesn't take a genius to think "well, if they both go through with that, why don't they..."
2) And come on, like they're going to play on after knowing they're both through. However they arrived at that result, whether you think it fair or not, you'd be crazy to think that late in the game they'd continue to press. Why bother? You're through. They're through. Just pass the time as best you can without taking stupid risks that could lead to losing or getting suspended. Any fan, while naturally decrying any killer instinct or lack of goals, knows that ultimately it's what you need to do. It's like teams protecting a lead by wasting time... except both teams need to waste time here.