If the best players available are Griffin (too many missed games) and Hayward (good not great), it makes sense why you wouldn't want to sign one to a max deal. If Lebron, KD, Kawhi, and Westbrook were all up for FA, no one around here would care about signing them to the max.
I want the Celtics to wait for the next great player to become available before signing another max deal. This might not be possible.
this is the last summer for max cap space (or near max) unless Boston let's Thomas, Bradley, Smart go.
And Boston just signed a max contract player worse than Griffin and Hayward
The only real issue is that, while signing Horford didn't require we have to sacrifice much (we let go of Turner and Sully), signing either Griffin or Hayward would gut A LOT of this team. (Kelly, Jerebko, Amir, Zeller, Mickey, maybe even Bradley/Smart + Green)
Depth becomes important especially late in seasons and in the postseason, as we're seeing this year too.
It becomes a real thin front court if you sign a max-player AND unless Ainge has another trade lined up for a rebounding big, it would be Horford, Zizic, then nada.
And Hayward/Griffin are great players but obviously not at the level of a Durant.
But Griffin would really fill a lot of our needs even with front court depth leaving, BUT his injury history really scares me.