The job of a good GM is almost like a politician. If done properly you won't be around to enjoy the plans you've laid.
Looking at 76ers, all of the pieces they've garnered was because of Hinkie, but Colangelo will reap the benefits.
Ainge desires to build a dynasty not just a one season contender. This comes with patience and instilling a positive culture within the organization. It takes availability to the right players at the right time.
Ainge doesn't make players available and sometimes we have to take a step back to make two steps forward.