It was the Mr Huang's personal weakness that enabled the spying.
I've said before. This was a private matter, and I will not crucify him for his mistake / weakness - though it does speak somewhat to his character.
However, the spying element of this is absolutely deserving of blame. The personal weakness he's shown has enabled a national security risk. That's no small thing.
Let's pretend I took drugs and got caught. That's a personal matter.
Now let's pretend I took drugs and then ran over a family while driving. It's no longer 'just' a personal matter, despite my having zero intent to harm. But I bet you'd still, and should, blame me as my personal failing led to significant harm. Manslaughter is different to murder, but it's still blaming me for what I'd done. Rightly.