It's just not fair. Really, it's not.
Why? Sometimes, you want to be someone you want to. Or do something you actually don't want to. But then, it screws up. It screws up bad. So, really, who cares? That's the point, nobody does.
On a more cheerful note, there are a million and one ways to cope with this. It all depends on whether we want to. Do we really have commitment? Passion?
The reason that's important is because reflects how we want to view life as a whole. Do we want to see it glumly or say, happily? This may all sound so, so far-fetched, but hey, who cares, right?