It's not what they did receive. It's what they were probably going to receive.
When you found out the Clippers had signed Kawhi and traded for Paul George, how did you think there team was going to perform over the next year? The next few years? What was the consensus of the experts?
The odds were the Clippers were going to be in the top five or six in the standings for the next few years. Both stars suddenly became injury casualties since, and that's why the draft picks they gave up were better. From OKC's standpoint, though, that was a longshot bet that worked out for them. No one could foresee that.