Maybe, but there are also a few hundred non-LeBron like players in the NBA. You can argue that the union negotiates away the rights of players like LeBron to benefit those few hundred players. But you can also argue that LeBron is only in the position to make as much money because the union has been fighting for him before he was even born. Would the NBA have free agency, guaranteed contracts, and players making tens of millions of dollars a year without the union?

Plus LeBron would be a near billionaire even without cashing a single game check. He makes way more money from being an ambassador of the game than from the game itself. Therefore he has a vested financial interest in the health of the league overall and the hundreds of other players in the NBA.

Back to software development, the question is are you the LeBron James of software development? Are you one of the handful of the best developers on the planet? If you are, I can totally understand why you might be against a union. If you aren't, you could probably benefit from a union.