So, are we just gonna ignore my post about the for sure presence of most of the amino acids necessary for life? Ya know, the one that's actually scientific, and not a series of base assumptions with no proof behind them?
It's not a matter of the amino acids existing...it's arranging the correct ones in the correct order. It's like having a huge, *thoroughly mixed* pile of an equal amount of red and white beans...also, there are over a hundred different varieties of beans. If you plunged a scoop into that pile, what do you think you'd get? In order to get the correct "beans" to make up a single protein, you'd have to scoop up ONLY red ones...no white ones at all. On top of that, you'd have to have only 20 specific varies of the red beans, and they would have to be arranged a certain way inside the scoop. Any variation whatsoever, and the protein won't function properly.
As rumborak pointed out, with amino acids being as commonplace as they are, then giving something time and a lot of trials means it's going to happen, at some point.
There's also the theory regarding interplanetary/galaxy seeding, as that article mentioned. If that is true, then all those "lucky" occurrences wouldn't even have to happen on Earth, they would've just had to of happened sometime in the previous, what, 15 billion years or whatnot since we posit the universe began?
By the way, pointing to the number of combinations possible in a protein, like you're doing, doesn't say anything about the probability of those proteins coming forming. Chemistry could easily favor amino acids forming certain proteins, making their likelihood even that much more likely.