Pennants are won with pitching, defense and 3-run homers. Not with spreadsheets. Spreadsheets help figure out where the pitching, defense, and 3-run homers are likely to come from.
You need to stop saying with certainty that the "Braves are a 75-win team." They could easily be more than that - or less. I said last year that the team was a 60-win team. I was pretty close. Know why? Not enough pitching, defense, or three run homers.
Your statistical analysis is fraught with spurious accuracy. False precision, if you will.
The issue is that you don't know what it means when someone says "the Braves are a 75 win team". Go out and learn a little about statistics, and then you won't be so upset over those comments. While you're at it, maybe learn how to use spreadsheets for more than the arithmetic used in calculating taxes.
Go out and learn enough to understand what this phrase means: "the projected win total for the Braves is a normal distribution curve with the peak located at 75 wins".
Until you know exactly what that phrase means, all your arguments against it are completely ignorant and pointless. When you understand enough about statistics to comprehend what that phrase means, you will stop saying moronic things like, "You need to stop saying with certainty that the Braves are a 75-win team". You will understand that silly statements you make like that aren't even counter to the idea you are trying to argue against.
The most likely outcome for the Braves is 75 wins. The next most likely outcomes are 74 or 76 wins. Less likely is 73 or 77 wins, then 72 or 78 wins. And on and on, until you hit the extremely unlikely case of the Braves winning 85+ games. Given that 75 wins is the most likely outcome, it is wise to plan around being a "75 win team".