Why is science just a starting point and not an end point?

It's because listening blind I've controlled for my bias. Amps that measure fairly close it's almost impossible to tell them apart. One could even be a tube amp as long as it's measurements are close to the SS amp. One reason is speaker distortion swamps amps unless they are garbage amps. You'll hear the speaker and room not the amps.

So, you are unable to differentiate between the two.

Again, is that because of the amps, or because of you?

It's because the amps measurements are close enough that any differences the human ear can't differentiate over the distortion of speakers. Correct I am unable to tell them apart because of the limits of human hearing. Dolphins or bats possibly could.

Take 100 people, who have hearing that "measures well" (Really good hearing)

Spend a year teaching those 100 people how to listen and what to listen for.

Teach them to understand critical listening. In the same way a sommelier would be educated.

Sit them down and have them do blind listening tests with the differing amps that have the same posted specifications.

And watch how they can differentiate between those amps...,

Take 100 people, who have hearing that "measures well" (Really good hearing)

Spend a year teaching those 100 people how to listen and what to listen for.

Teach them to understand critical listening. In the same way a sommelier would be educated.

Sit them down and have them do blind listening tests with the differing amps that have the same posted specifications.

And watch how they can differentiate between those amps...,

Very right ...

I will add that first music is a listening experience where there is no object (sound) which could be separated from the room//Ears/ in that order, and evaluated MAINLY with an electronic  tool instead of the ears...

Basic psychoacoustic science which is a science connected to physical acoustic but different with DIFFERENT goals must not be confused with it...

Some badly misinformed people  reduce even physical acoustic to electronic, not knowing then  what is psychoacoustic anyway...

To hide their ignorance they promoted blindtest to debunk  any audiophile experience beeing a "bias" without knowing what is a bias and WHEN  do we must erase it from an experiment ....

Because they really think that the taste of the soup is explained mainly by  the different  materials   constituting the saucepan and the temperature to be set...This claim  is even not untrue....But  proposing always ONLY to consider the materials adavantage of different saucepan and temperature for an explanation of the "particular" taste of a soup is  very limited to say the least...The ingredients(acoustical conditions and other parameters) play a more significant role sometimes in the experience...