It's just math. Does anyone really think the M's can go 16-6? Have they done 16-6 at any point in this season?
Let's look at the schedule. The next 7 games are against the Angels and Rangers. Just for the exercise, say we go 5-2. Then 3 against the Astros in Houston. Let's be optimistic and say 1-2. Three more against the Rangers at home, 2-1. Three against Cleveland who is playing lights out. 1-2. Three against the A's. 3-0. Three against the Angels (in Anaheim) to close the season. 1-2.
So what's that add up to? 13-9. 82-80. Could there be some magic and win a couple more series and have it end up 16-6? Sure. Just as easily could go the other way and end up 9-13. Maybe the pitching matchups favor us, maybe they favor the other guy that night. That's why you play the game.
Since that disastrous first week, the M's have been basically a .500 team, perhaps a game or two above. Since this is not the NHL or NBA, a game or two above .500 doesn't get you into the playoffs.