I disagree with your proof. The counterproof? The Boston Celtics. Ray Allen and Kevin Garnett sure didn't need a lot of time to develop chemistry to win a championship. And while you see Miami as a great proof, the fact that they won a conference championship in their first season with their super free agents is evidence that the team actually was pretty darn good, not a total failure in spite of what chemistry issues outsiders will read into the team. But did Utah ever win a championship with their Hall-of-Fame combination of John Stockton and Karl Malone? That was great chemistry, but they couldn't win a title. Again, chemistry is such a difficult item to get a handle on that I wouldn't even know where the BB developers would begin to try to figure this out.
Don't ask what sort of Chunks they are, you probably don't want to know. Blowing Chunks since Season 4!