Well, if the average American views 7/10 as the average on a 1-10 scale, it really just proves that their view is skewed, objectively incorrect, and cannot be used as a useful measure in this. Being wrong in multiple (and completely unrelated) instances does not make any of them correct.
How? The average American already has 70 as a reference point for average. What part do you disagree with?
Well, if the average American views 7/10 as the average on a 1-10 scale, it really just proves that their view is skewed, objectively incorrect, and cannot be used as a useful measure in this. Being wrong in multiple (and completely unrelated) instances does not make any of them correct.