OT Coin Toss = 49'ers Demise?

Not dumb. Yes, you establish what is needed to win or continue the game for the opposing team…but assuming the team does not match or only matches your first possession score, you get the benefit of first team with next score wins.
Are you serious? It was a dumb move.

To not defer is not the smart move. Think of a Vegas black jack dealer playing his cards first. Why would you put yourself in that position?