At conception, you could have been one of more than a million different sperm cells trying to make it's way to the egg. There is about a one percent chance that your father would have died before he even met your mother. Your mother happened to excrete the one of two million possible eggs that made you. There was more than a 5% chance that the fertilized egg would have missed implantation.
Just looking at those statistics...
0.000001 * 0.99 *  0.0000005 * 0.95
So there was about a 0.000000000047025% chance that you would exist, looking at one generation. However! This was true of both your mother and father and every pairing going back for the last several hundred thousand years. So if we just look back some 100 generations the likelihood that such a combination would come together throughout the years to produce you is
0.00000000000047025^201

That's 1.37*10^-2478! It's actually significantly less likely than that.

1 in 2^80 is about 8.27*10^-25

So the fact that you exist means that at any given time the same exact address will be found 100 times in a row! According to you, I could say 1.37*10^-2478 is probable, because it happened, and therefore finding a particular address 100 times in a row is also probable.

What you're doing is a subtle form of selection bias. Out of the whole world, and given a long enough time period, matter is going to arrange itself in ways  that are infinitesimally unlikely. Sure it's unlikely that the guy would get hit by lightning that many times, but why select for lightning? At the creation of the universe, what are the odds that a particular electron would end up in a molecule in a cell in his spleen?

It's also a form of gross generalization. You could come up with any number of things that have happened that are much less likely than finding a collision, but so what? That doesn't mean finding a collision is any more likely to happen or less costly to achieve over a given period.

http://www.cdc.gov/nchs/data/nvsr/nvsr53/nvsr53_06.pdf