I think this deal was about the long term too. I don't feel great about giving IT the max as a 30 year old with a bad hip. Eventually, he's not going to have the explosiveness to score at the rim at well, and he'll be an even worse defensive liability than he is now.
Crowder is a replaceable part with Tatum and Brown, and Zizic looked like garbage in the Summer League. That pick hurts though. I'm surprised they low balled the Pacers and Bulls for George and Butler, but went huge for Irving.