This, I think. It looks to me like an attempt to deliberately invoke the Fundamental Attribution Error on oneself.

That said, I still think there's a core of use here. Picture a game involving a couple of dice -- say one four-sided die and one six-sided die. To win the game you need to roll above, say, 8. The catch is that the d6 is rolled as usual (chance), but the d4 can be influenced -- in the easiest case you can just set it on the table however you like, harder cases require some set of difficult actions to get a particular roll.

It's pretty clear that you have some control over this outcome. In fact, it's necessary to exert some control if you want to win, because the chance die can't reach the winning value alone. On the other hand, sometimes chance will screw you sufficiently thoroughly that no amount of effort will suffice. This seems like a pretty good model of how life works, and justifies discarding both the "it's all me, I put all this effort in and failed and that is evidence that I am a Platonic Failure" attitude and the "it's all chance, no point in putting in the effort" attitude.