I don't think anyone thought he was untouchable because of what happened to his sister, it was mainly how they shipped him out before he even recovered from his injury. Also that his injury was misdiagnosed and surgery was delayed so he could play was a bit of an issue as well. Had he had the surgery and rested up they wouldn't have had a deep playoff run that year but then they probably wouldn't make the Kyrie trade either. Instead they hid his medicals, downplaying what the problem was and sent him packing for a PG that was arguably at a similar level as him. Kyrie was younger but IT came off a season where he was a legit MVP candidate and then after he recruited Hayward they sent him packing for Kyrie, and the Cavs were a rival of sorts for Boston at that time.
Who knows, maybe Kyrie bolts and they can replace him with IT on a cheap deal? That would be interesting and I wouldn't put it past Ainge to try if Kyrie really does leave. I think next summer will be another difficult period for IT because he still hasn't returned to action but he shut things down in March last year to have surgery on his hip, finally, after being dealt to the Lakers by the Cavs. Now he's just sort of waiting to heal to join Denver's rotation and prove he's worth more than a minimum contract. If he ends up playing for the league minimum again the Suns better try to sign him. I know he shouldn't be option #1 but if we strike out on a number of players and IT is still out there then we need to bring him to man the Point for a year. He's not ideal but he is a legit NBA PG and is better than what we have.