No, Cowher understood that a lot of random stuff happens in a game and to be a consistent winner you have to over come that.
The facts remain the Saints left points on the field in the first half, and had terrible play calls in that set of down. If that pass is caught it’s short of the first down and the player goes out of bounds and stops the clock. Without the PI it’s a TERRIBLE play call that puts them in the exact same position they landed in: didn’t burn enough clock, left the Rams plenty of time to time it back up. The Saints needed that call to rescue them from a bad series where they stopped the clocked twice FOR the Rams.
This is like Red Sox fans blaming Buckner or Cubs fans claiming a random fan cost them a shot at the World Series.