For me its drafting Sexton over Mikal Bridges.
If the Cavaliers knew they were getting Garland the next season he may have made sense. But looking back if the Cavaliers started off the rebuild with a 22 year old role player people would have rioted. Looking at how he performed in PHX before CP3 came to town I'm not sure how he would have been viewed. Look at the backlash the Cavs got for taking Agbaji at 14 to be one of the final pieces to a rebuild.