I'm not claiming a single static binary is going to prevent bugs or outages. It's just a surprisingly nice property (though less-so on the backend). For example, because Go distributes as a single static binary, we can make scratch images that weigh in at only a couple of megabytes. This (alongside fast compilation) means we can iterate more quickly in the cloud (pulling images onto nodes and starting them is almost instantaneous). This is particularly helpful when you have an outage and you're trying to get things un-stuck (you can try a lot of things in a short amount of time). It's one of those things that aren't obviously valuable until you've tried it.

Again, it's not the end-all-be-all, but it's a surprisingly nice property.