Boston is not a contender so resting starters is just silly.
Unless the only team in the league who you consider a contender is GS, then this statement is nonsense. We’re just as much of a true contender as Cleveland, SAS, Houston, etc.
No we aren't. Cleveland and Houston, especially both have significantly higher title odds than Boston does. They aren't close (and that accounts for Houston having to beat not only GS but also a team like SA just to make the finals). San Antonio's are about inline with Boston, but that is really only because they would have to beat both Houston and Golden State just to make the finals. Then you have teams like Toronto, which right now would likely be favored to beat Boston in a playoff series (especially if Toronto ends up with home court where they are 14-1).
It is fun to think of Boston as a contender, but that 16 game win streak was a fluke. Boston is closer to the .500 team it has been since the team started 22-4 than it is to a 22-4 juggernaut. And that is ok, but there are going to be a lot of very disappointed Celtics fans when the C's lose in the 1st or 2nd round even though the team should be applauded for turning the season around after losing Hayward 5 minutes in.
I would suggest that you are over-correcting the projection.
I think Boston is probably a 50ish win team, though with the hot start will probably finish around 55. A 50 win pace is around 60%, that is closer to 50% than it is to 85% (a 22-4 start). Even 55 wins is a 67% pace, which is still closer to 50% than it is to 85%.
You're using the wrong argument. For instance, if they finish with 56 wins they'd be closer to the "juggernaut" percentage. Finishing with 56 wins over 55 doesn't mean that much. Similarly, their record over 15-20 game stretches of the season doesn't necessarily represent the whole of the team in either direction.
There's truth to what you are saying, but I think you're over-correcting.
If Boston finishes with 56 wins it will go 26-16, which is 62% the rest of the way and closer to 50% than 85%.
You were just using win totals for the season, not finishing stretches, so that's what I did: "A 50 win pace is around 60%, that is closer to 50% than it is to 85% (a 22-4 start). Even 55 wins is a 67% pace, which is still closer to 50% than it is to 85%. "
But again, you're not using the argument you want to be using. And you're also intentionally limiting your sample size when you have a much larger sample in front of you.
Every team has hot streaks and cold streaks, better and worse starts/finishes. Those things make up the whole record. A team isn't its 22-4 start and its not its 30-11 finish (2016-2017 Miami Heat).
If you are going to use a team's record to prove its contender status, you must include the best sample, which outside of variables (injuries, roster changes etc.), would be the
largest sample possible, which is the entire record and not arbitrary streaks within. Yes, the Celtics last 14 games is as arbitrary as their first 26. Less arbitrary is all 40.
The Celtics won't win 85% of their games, but the 22-4 stretch is part of their record. It is
an indicator. Don't be fooled just because it was at the beginning of the season.
Now, we also have yet to tie your arbitrary win percentage to contender status. You simply say that being closer to .500 than to .850 disqualifies you as a contender. Again, pretend it's not the Celtics and pretend some other team wins 56 games instead of 55. Would they have significantly less chance of contending had they lost one more game?
You're using the wrong argument.