If I'm not an absolute superstar in the NBA getting paid 30+ mill a year with endorsements, then I would personally rather go play in Europe, as long as I'm making a few mill each season. Europe is one of the best places to live arguably, you probably don't have the media on you after every bad game like they are in North America, and the league is probably less stressful and more fun.
Plus, everybody makes fun of the NBA now for being fixed, and even though that Celtics/Lakers match wasn't a fix (for both teams to get there) most likely, it added fuel to the fire.