That argument is missing a very large piece of the puzzle to be complete.
Whilst I agree with you that we've won some games off the back of goaltending, I can also name a few where we lost because of goaltending (either the other goalie playing lights out, or our goalie not giving us a quality start). That's hockey, every team can win or lose based off goalie performance - it's just a fact based off of the importance of a critical position (like a starter in baseball - though a lot less nowadays.)
Additionally, our best scorers are mostly suffering from low SH%, which will also normalize as we go along. We are seeing the Jets create more high danger chances and getting more quality shots as of late, and I'd expect that to continue.
So, overall, I disagree that we are going to regress and fall down the standings. I see the team actually become more successful as our supreme scoring talent starts performing as expected.