What does this have to do with anything? For months people had known James was going to free agency. Additionally, he wouldn't give the Cavs any guidance on what it would take to keep him. And you also had the tampering going on with Riley when the Cavs played in Miami early in that season to go along with the pact Bosh, Wade, and James made at the Olympics. Additionally, Miami was the only team that had gutted their roster to such an extent to make it plausible they could get all 3.
If LeBron said Miami in that interview it would have caused a huge controversy and people would have been screaming about tampering even more than they already were. Also, if LeBron was dead set on playing with Bosh and Wade but also wanted to go through the process, he would have undermined his ability to do due diligence because other teams might have backed off.
And in the end, your link doesn't mean squat.