OT Coin Toss = 49'ers Demise?

Shanahan said his logic was that he wanted to be the one with the third possession when it changed to next score wins. Makes sense except for the fact that they didn't score a td on their first possession. Second the Chiefs said that if they the 9ers had scored a TD on the opening drive they would have went for 2 and the win if they scored a TD so there wouldn't have been a third possession for the 49ers anyway.