Like who? Wade was injured almost every year after the first, needed to be put on maintenance plans to keep him ready for the playoffs, and this is with Lebron taking a HUGE chunk of the offensive load to keep him fresher. He's have broken down even sooner.
Lebron was the best playmaker, rebounder, defender, and most durable player on the team. Bosh had injuries every single year after the first when it came to the playoffs.
Are you ignoring all those factors? Wade breaks down quicker, they lose Lebron's versatility and consistency, they were one of the worst rebounding teams with Lebron and struggled against teams with size, etc.
Put Lebron on the Bulls, Celtics, Knicks, Pacers, etc, and they become MUCH MUCH MUCH BETTER.