It appears to be silly to waste more energy on the "accuracy from specifications" nonsense.
You are definitely correct from your perspective that "accuracy from specifications" is nonsense - it is also silly for any of us to "fight" about this.
However, to be fair, some few people do value accuracy enough to give it a high weighting in their equipment selection criteria and do not regard specifications and measured performance as nonsense.
Specifications and measured performance are rather important in our modern world. Without it we would not even be here on this forum chatting via the internet.
To give an example, I wish the Mark Levinson system in my car was designed with more attention to accuracy - because quite frankly the darn thing is just an incredibly expensive "19 speaker" boom box. However to most people's tastes it sounds awesome.