understandnig a FCP ni this game is rather easy: you either steal the ball before the opponent gets a shot, OR the opponent gets an easy shot (read easier then with any other defense).
So it's quite normal that any attempt they tried, had higher chance of going in...
so far for the "defending like a bot" that Revo talked about.
FCP can work in this game, but play it against the wrong opponent, or with the wrong team, it can be devastating.
I have won many games using FCP, while I saw it work like a kiler machine. I also had 1 terrible loss, and it might very well have been against Joe, or Sum, but I'm not sure any more...
I guess there's also some in-betweens. But I didn't have them yet. I recall making the choice only versus teams where I was confident it would work (and it did) and use it once as a desperate act of madness, in a game I didn't expect I could win, and then made the defeat worse by picking this desperate action, knowing beforehand it wasn't likely to work, but didn't know anything else to play either.

They are not your friends; they dispise you. I am the only one you can count on. Trust me.