I was going to drop this conversation until you replied back, so I'm going to give you my take.
You're not fooling me, I do realized the last three NL Champions have won less than 90 games in the NL. What I also realized that two of those teams were Atlanta and Philadelphia. Two teams that are far more superior talent wise than what the current Chicago Cubs are in. They have MVP caliber players, the Cubs do not. When it comes to Arizona, the only reason why Arizona made the playoffs was due to the Cubs going 7-14 in their last 21 games, with 3 of those 7 games coming from a sweep from Colorado. No sense of living in that past all over again.
It's not all about the results, which is something I do believe fans get caught up in, it's about how the Cubs play against their opponents. They could've/should've won today, and take 2 of 3 against Tampa Bay, and it doesn't change my mind about how they're playing. Yes, they swept the White Sox in that two game series at Wrigley, but they still played like dog crap.
They can't hit, they can't play defense, especially at 3rd and catcher positions, and they have a bad bullpen. All of those things will not get replaced or get better over the 90+ remaining games left in the season. At some point, they are who they are, and in my opinion, that "same point" is here.
I know your theory, try to get to 84+ wins and to get in the playoffs and "see what happens." Which some how worked for Arizona last year by beating a depleted Dodger team in their starting pitching, a Phillies team that tried to hit a 3-run home run with no one on base. It ended up getting them to the World Series, before losing to Texas in 5 games because they don't have the players like Texas does, and it was obvious. Arizona was outmatched. If you want to "buy small" at the deadline, then go ahead, but it doesn't cover up the issues at other spots.