You need superstars to win big in the NBA. Yes, there are a few exceptions like the early 2000s Detroit Pistons, but as a general rule of thumb, you need a top-10 player in the league if you want to win the title. No one should know that better than the Toronto Raptors.
There were many times during the Philadelphia 76ers series when the Raptors were outclassed, outmanned, and quite frankly outplayed. During key stretches, the Toronto offense felt as cohesive as the narrative behind a Kyrie Irving monologue. During those stretches, Kawhi Leonard carried the team.