Maybe, but there's too many variables to know for sure: how Doncic develops in the NBA, how serious Kawhi's injury is and how it affects his career going forward. Plus, Doncic is cheaper, under team control for longer than one season, fits better with the Clippers' present timeline, and doesn't come with the drama of Uncle Dennis and the "group."
It would be a franchise-ruining disaster to trade Doncic for Kawhi, only to watch Kawhi sign with the Lakers after this upcoming season. How can we be sure that Kawhi wouldn't pull some like that when he's quitting on his current team right now?