That "unwarranted chance to boost your PWR" are all some teams have while being a bubble team. While that "throw away" game may not mean much to a Wisconsin or Denver, Ferris State needed to win their third place game for a shot at making it.
Hell, had UMD beat UND, and lost in the semi-finals, they definitely could have used the third place game to posture themselves to not fall from the PWR.
Or Notre-Dame/Northern Michigan two years ago in the third place game, where a win or loss by Notre Dame put them into the Tourney. A tie to NMU would have eliminated ND.
If third place games are that useless, let's also eliminate them from holiday tournaments. They're also just "unwarranted chances at boosting your PWR" because you're not playing for a holiday tourney trophy.