We do have actual proof of TAO and who used it. Actual evidence which could be used in for example a trial. A high likelihood attribution isnt evidence. There is a limit to how sure you can be with attributions of cyber attacks.

This is directly from the rant you posted.

"Attribution is a good example of doing true intelligence analysis; there are no certainties"

>Why do you feel the need to have a strong opinion about it?

A lot of people try to use attribution as something it isnt is, as evidence. There is no reason to muddy the water and use the misrepresentation of attributions for political means. This nonsense gives the entire field a bad rep. Its intelligence analysis and not forensics.

I find it a bit rich to call others ignorant, when your argument consists of nothing more then the assertion that your counterpart is wrong and unnamed experts would agree with you.