First of all, Danny Ainge isn't brutal, not even cold blooded, he traded IT to the team in the Final, it's IT himself messed it up by not having surgery plus bad attitude with Cavs, and still he can go to whatever team he wants after this. as for the MAX? he simply doesn't worth it.
oh and danny doesn't kill his sister nor do him force IT to play, the only thing will be the misdiagnose but that's not on Danny nor should he give IT the max because of it.
Danny is just being smart and decisive, that's all.
Second, Lebron can sign with MLE. so he can pass MJ in rings to fulfill his dream, that alone is worth more than a max contract whether it's financial or legacy stand point.