Whats the logic behind it though? Players pushed themselves to the limit or something?
The logic is that it creates another tactical aspect for smart managers to overcome managers who rely on having a stronger roster but no interest in learning the game and how it works. So many people who play this game try to tie it to real life experiences, when the reality is the game engine is "based" on basketball and not a 100% replica. Basketball is played on a court with a ball, buzzerbeater is played on a computer with mathematical equations...
50% is definately higher than the real life equivalent, but anything less would ruin the game for those who take the time to study the game and set a relivant strategy.