Orniletter
Banned
It doesn't, because they knew full well she was being harassed and did jack about it while it was happening.
Also, having a second job wasn't the issue. Alison Rapp said that it was part of policy that such a thing is accepted.
The problem is the content. We don't know Alison Rapp's "other job" was. There's no way for us to know how and in what way it "went against their corporate culture". That's a discussion of its own. What could she have possibly done and how does it "go against their corporate culture"? Plus, the only reason they know about it is because of the harassment campaign.
Nintendo failed to show any empathy whatsoever to a victim of harassment while it was happening. They're just one part of an ongoing problem in the industry, and their complicitness with it is just sad.
I agree that it would be great to have companies stand openly against harrassment. I don't disagree there, I concur.
But, as Nintendo's statement in the OP has outright said: The whole GG hobbubb is not related to her termination and people like Lime seem to go through some mental gymnastics to tie both together.
Nintendo could have released a public statement "Yamauchi's eternal spirit will haunt all those who harrasssed Alison on twitter and we'd rather see our office in Redmond burned to cinder than a single one of you pig-men* ever playing one of our games again" and it wouldn't have deterred anyone from sifting through her dirt.
And she tried to hide something. We'll see what her second job really was, I guess. It will come out, sooner or later.
* I assume most, or even all of her harrassers are men.