Especially in ZvZ where spine crawlers can be built, it's not an auto loss -- it's a bet that the opponent is playing a little greedy, and a chaotic fight.
That's not a worker rush, that's an early pool where you brought some drones.
If it is a viable strategy and not a real edge case to punish some maximal greedy strategy, the game should probably be patched.
..what? Thats an absurd consequence -- sc/2 has a hundred different ways to rush, and they all come with the note: if it works, you win, if it doesn't, you're dead. And everyone accepts it. What's so special about drone rushing that it'd receive such consequences?
I mean hell, there's Has specializing in cannon rushing and goes damned far; but drone rushing? No, thats just too much!
It meant that the AI actually found a working strategy against one of the standard bots, where it had not found any before.
It will probably never work when it starts to play against itself, but we don't know if the AI is already at that point.