Ummm...that's not how that works! Different decisions, lead to different scenarios, which in turn lead to different outcomes! If Sheridan would have kicked the field goal in their first 4th down scenario and made it, does not mean they would have been in the same exact situation later in the game to have to kick another field goal or ANYTHING would have gone anything like it originally did. So many different things could have and probably would have happened where the game would have been completely different (for better or worse) if they had gone for the filed goal.
Have you applied the same logic with Big Red's first drive; what if Big Red just kicked the field goal instead of going for it? Sheridan would not have gotten the interception, and then any late drive by Sheridan would have been moot because Big Red would have been up by 2 scores, right? NO, because different decisions, lead to different scenarios, which in turn lead to different outcomes!