Just thinking out loud here, but if it’s true that Kevin Durant has no leverage in picking his next team, why are the Nets trading him in the first place? Before I tell you why this matters to the Sixers, let’s answer the question. The idea that Durant’s contract will limit his veto power over potential trades is one that has been raised on a number of occasions since the news broke that he wants out of Brooklyn. The thinking goes something like this: Durant will earn $196 million as long as he plays basketball for the next four years, which leaves him little choice but to play basketball, reg…