Comparing our own experiences in amateur/pick-up basketball games with some of the world's elite athletes is like eating in KFC, McDonald's and Taco Bell and calling ourselves food critics. Boxing out some fatass who had 2 pints before the game isn't anywhere near NBA level. We're simply talking out of our arses.
These people have been training, playing and hitting the gym for most of their lives. They eat very specific diets, are constantly checked by physicians and sports medicine professionals. Injuries can happen for a big number of reasons.