Andy Reid is 66 and about to win a third straight. Belichick was old as well. Both men on their second teams.
Would you not take Sean Payton as your coach either because he’s 61?
Young coaches fail a lot too. They all do. It’s hard no matter what age you are; there is no perfect formula.
It’s okay to say you prefer a different, younger coach without diminishing the competition with inaccurate statements.
Heck, outside of the one Sean McVay won, almost all of the recent Super Bowl winning head coaches have been older, experienced men.