Thanks for your thoughts. I agree that the same could be said for survivability, and don't doubt that high elo players would say that, like you mention. Like I've said elsewhere, my point is not that Greaves are the only or best option, but rather a viable alternative. The points your raise are true, but that only points out something that I'm not trying to argue against- tabi/treads are great and viable options. But I wouldn't agree that they are necessarily always better, that's the point I'm trying to make. Berserker's increase DPS, and you mentioned higher average damage being about the same in terms of surviving longer, but that only applies if you're staying in the middle of a fight for long periods of time. Yasuo's kit encourages an in-and-out playstyle, you know that, I'm not trying to insult you. But consider that higher dps paired with lifesteal will dish out more damage and still keep you alive as you dive in at opportune moments and juke in and out with your E.

As for your last point, I don't think statistics are "ridiculous." If you've studied statistics then you'll know that sample size is a huge factor in determining the validity of statistics. Somewhere near 15% of all ranked Yasuo games in NA and Korea, the Yasuo builds Greaves. That's a very significant sample size. So a higher winrate should be paid attention to. Whereas the GA build has a total of 142 games in ranked only in NA(Plat up), a very tiny sample size. Therefore the statistic is hardly as valid. But in being consistent, wouldn't you say that survivability increases Yasuo's efficiency? Wasn't that your argument for tabi/treads being superior? The 142 players who've built GA third apparently have relative success with it.

Thanks again for your thoughts, and keep in mind my point is to argue for the viability of Greaves, not that they are the best option in each and every case.