What's the REAL reason(s) so many "top" players are busto?

[GambleAB]

Almost no one is as good as they think they are. Some are not as good, but are still winning players, and some are going to be longterm losers. The long term is a VERY long time, especially if you are playing live and infrequently, so you are going to see a bunch of "great players" that don't adapt to the fact that they just aren't that great and slowly, over time, going broke just from playing poker. Add to that the fact that some people are playing out of their bankroll, the fact that everyone has life expenses that they need to take out of their bankroll, and the multitude of other leaks (pit games and drugs being the top two) and it's no surprise that you hear about different people going bust every year.