Why The Bulls Do This

They have now gotten two solid guard options in Coby White and Ayo Dosunmu and if you just attach a few seconds to Lonzo a team that isn’t great will just take a chance to see if it works out

Why The Raptors Do This

If Lonzo works out for you, you now have another guy to add to your core of Barrett,Quickley,and Barnes to be this 3&D PG for the future of your team. If it doesn’t work out thought and he doesn’t play much and not show any sign of what he was then you can use the exception for career ending injuries and he will also be a free agent at the end of the year anyways