The Spurs were contenders in 2016 and 2017 with Leonard averaging 2.6 and 3.5 assists per game respectively. He may not be a pre injury elite defender for the Raptors but who would be after missing nearly an entire season of basketball. Everybody and their mother knew it would take some time and his defense has vastly improved since the start of the season despite his negative DRPM.
Kawhi is going to lead Toronto's offense by scoring because that's what he does. Were people ing about Kawhi taking shots away from "Airball" Green, Paddy Mills or Tony Parker? I think not. Why should it be any different in Toronto? He's a means to an end and he's one of the most efficient players in the NBA. Why should he pass it to a less efficient player? He doesn't have to be Lebron James to lead an offense to a championship. Toronto isn't short on playmakers (Lowry Siakem, Powell, Vanfleet, etc), they need finishers.