If you are aiming for the Rose Bowl I agree. If you are aiming for the playoff then there are a million reasons to cheer for MSU.
The primary one being, MSU loses, beats OSU, Iowa faces a one loss team in B1G Championship, but since it isn't an undefeated OSU, it loses it's luster and an undefeated Iowa team is left out of the College Football Playoff.
In the case above it would be much better to face an undefeated MSU team in Indy.
Michigan State loses to Nebraska but beats OSU? Yeah right. Huskers over Sparty is good for Hawkeyes when considering the most likely ways this season plays out.