Yeah we all knew this was possible if not inevitable (re: Kawhi). The options were either keep DeRozan, lose in the 2nd round, and contemplate blowing it up, or make the trade, win a title, and lose Kawhi after a year. I'll take the latter any day of the week.
But I won't lie, I hope Kawhi doesn't win with the Clippers. I think he will, they are very deep, but I can be appreciative and salty at the same time.