except the Celtics easily could be better off had they not signed Horford. Perhaps Ainge pulls the trigger on a Cousins, George, or Butler trade since he would still had room to sign a max level free agent like Hayward. Maybe Boston still has the assets to acquire Irving. Wouldn't having one of those players instead of Horford be a better position.
It's way, way, way too easy to simply say, "If they hadn't done Z, they could have done A-Y" because it's near to impossible to prove otherwise.
Could you be correct that, if they hadn't signed Horford and headed into that season without any major free agent additions, they could have later acquired Cousins, George, or Butler as well as trading for Kyrie and also signing Hayward?
I'm sure you could write some compelling creative fiction about such a scenario.
Do I believe it would likely have happened? No, not at all.
Let me make this very simple.
The Celtics are a very good team. Not top of the league, but in a normal year they'd be a borderline contender. That they have no realistic chance at a title is more a function of the conglomeration of talent at the top of the league right now than anything else.
Al Horford is a major, major part of the Celtics' success. Throw out the basic box score stats. Anybody who spends a significant amount of time regularly watching the Celtics who does not reach the conclusion that Al Horford is integral to their success on both ends, as well as off the court, does not know very much about basketball.
These two points are incontrovertible in my mind.
If you want to say that Horford is an excessive overpay (taking up 25.68% of the team's cap), especially in light of the fact that over half the roster is comprised of players either on their rookie deals or on veteran minimum contracts, that's your prerogative.
I don't think it's supported by facts or well reasoned analysis, but you can go ahead and think it nonetheless.