If you drop an iPod, and the iPod breaks, the iPod wasn't necessarily destined to break. It broke because you dropped it. But if you only became aware of the iPod's existence after it was dropped, you would think falling was its natural state, and when it inevitably shattered, that could seem like some tragic destiny.
It's just an example - I've dropped iPods without breaking them many times. But in the same way that any sufficiently advanced technology is indistinguishable from magic, any sufficiently obscure cause is indistinguishable from destiny.