Ok,Actually it's like saying there are no better DACs because no expensive DAC measures better than the best $100-$300 "mass-engineered" options.
Which is true.*
*There may be features/aesthetics/etc. reasons to choose a more expensive DAC but those are not relevant to our opamp analogy. This is purely about performance.
Maybe this analogy works...
Imagine you have a 9mm pistol. You have two boxes of ammo.
Both weight the same. 115gr. Both have the same velocity and therefore roughly the same ballistics. (Keep in mind that there is a spread in velocities)
So you want to test this. You pull a round from each box at random. You pull the bullet, you weigh the bullet. the charge, and you verify that the numbers on the side of the box are correct.
You then take your chronograph and measure 10 rounds from each box. You get the average velocities and verify the data from the side of the box.
Now the difference between the rounds... one bullet is FMJ, the other is a critical defense round.
If we just looked at the ballistic measurements... you'd argue that there was no measurable difference therefore they are the same.
(Even though the critical defense costs twice as much.)
You've measured the ballistics, not its terminal effects. The critical defense round will expand/deform and dump more of its energy into the target (bad guy).
And this is like Amir's measurements. Note that I'm not arguing that his measurements are wrong but that they don't tell the complete story.