It's always weird to see americans bashing football's intrincacies... that last page was hilarious especially the OP.
People who don't understand football should be a little quieter about it. You don't see me bashing baseball for instance. Or cricket.
Yes, Germany and the US could just play boring and tie the game, except it's very rare for teams to do "just this" for 90 minutes. Eventually one team scores and all hell breaks loose. You have to understand that while this "we all tie" is the prison's dillema best outcome, you only need a "cheater" to ruin it altogether, and teams like to win. Both the US and the Germans have shown they have the spirit to win games, not "tie games".
Of course, if the clock is running 75 mark and they are still tied, it's quite likely the game will become really boring with mutual unwillingness to do much about it.