I think it was their only option to double down on their decision and give Mazzulla & the players stability.
In saying that, I have always wanted Rick Carlisle, and he should have been signed after Udoka left.
I do think Mazzulla is an extremely intelligent and talented coach, but he is too inexperienced for a team with title aspirations. Inexperienced coaches make inexperienced mistakes and we have seen that over the past 3 seasons.
I like Carlisle as well, but the Celtics did win a championship with Joe as HC not too long ago.
Yeah I agree Joe coached us to a Title. But I still don't know how much of that was him, or was most of it just JT/JB finally getting over the hump, and having great team mates as well. Jrue, D White were huge during that playoff run to the title too. I think that another coach could have easily won the title with that team.
You can make this argument about every single coach who has ever won a title, though. No coach wins a title without great players playing great basketball.
I suspect it's kind of like listening to a symphony orchestra...everyone has to play their part to create harmony that inspires. It's not because of any one person, it's just how the whole comes together. And because it's about group synergy, it's not as easy as saying "I will replace the conductor, or the trombone player, because I don't like them", because that might affect the whole sound. You might replace them with an individually better person, and the orchestra might still be good, but there might be that something special missing that the other group had. Team of champions vs champion team, whole is greater than the sum of the parts and all that.