Don't compare our answers.
What I wrote
here, was that there have been strong indications that 09V is intended to be competitive with the world's leading SSN classes, however wanting to confidently claim the extent of that competitiveness is not something we can do.
What you are suggesting
here, is outright saying you do not believe that 09V can be competitive at all in general with the world's leading SSN classes.
And what fairandunbiased wrote
here, is that the current main domains needed to mitigate noise control specifically in SSNs are a matter of technological advancement in established areas of industry for China.
Out of all of our three posts -- yours is the only one that outright suggests China cannot build or develop a competitive SSN.
Whereas what I wrote was that based on past rumours and indicators it seems like they believe they can develop a competitive SSN in the form of 09V, but the exact extent of competitiveness in various domains is not something we can state.
Whereas for fairandunbiased, he is saying that the specific methods to mitigate noise in submarines is well understood and is merely a matter of technological advancement in terms of machinery and hydrodynamic modelling.