Is positive reinforcement why things are sounding better?

I have Tube Rolled on a few occasions, where there has been a Selection of Valve Pairs to be evaluated. 

Tube Rolling is a Two Edge Sword, as change to an end sound, can be noticeably discernable.

The change can stimulate a reaction, but does not necessarily create a betterment in sound for the end user, but a difference only. 

There are Tubes when demo'd as a type from a selection of types. that are capable of making a very good impression.

Most demo's I have been party to, have been carried out as a group in attendance. Within the group, there is not always a unanimous agreement, on what is the better tube. 

With the differences of assessments known, it strongly suggests that recommendation may not be ideal for a end user. 

"Soundproof Listening Room." Is that a Demetri Martin line? It seems to me that a soundproof listening room would be absolutely the worst kind.  Also, don't people notice if a new thing just sucks? Regardless of the cost...if it's not good (or maybe better), no amount of expense is gonna save it.

Confirmation biases has nothing to do with "lying to ourself" in particular or specifically

Yes, it does, obviously.

I walk into a certain big box store with a special high end audio room named after a tree in my front yard, I see some big name audiophile gear with impressive looking drivers and amps with big blue meters.  I’m in a large rectangular room lined with speakers against the wall and a bare tile floor.  I even see a pair of ML speakers pushed against the wall behind me.  The salesman puts on some music.  It sounds like a big boombox.  The music is bleak and uninspiring.  I’m dying just to move the speakers out from the wall.  But If I am a young, impressionable and budding audiophile then my conclusion is this 6 figure gear is so not worth the money.  I come to these forums and expound on my displeasure and distrust in the high end hifi community.  Everything is either snake oil or confirmation bias.  This so called hifi sound is a myth.

We have so few audio stores left but at least the few that I have been in have good set-ups.  Back a few decades, more audio stores than not had poor set-up.  Only a few stores had a room with a high end set up to showcase one system vs. rooms with gear wrapped around the walls.  But when you walk into a room with a good high end set up, be it a store or in someone’s home, you will know it.

I formulated it incompletely to answered your post which is not even wrong,... Because lying is a possible result of the incoming confirmation related to our biases but not necessary part of the process.

Confirmation biases do not begun with a lie , they begun by taking a road instead of another because each incoming steps taken confirm that we are right picking our stating point to begin with ...It is an objective process in ourselves once our biases set had selected a starting point ...And biases are not lies and they do not implied necessarily liying yo ourselves.

it is a process that is undetectable at the beginning, picking a road because it fit us like a glove instead of another like someone who realizes, for example, that a favorable review of a product proves that he have made the right choice which is not always true because our biases can induce us in error... An error is not a lie.

If you reduce confirmation biases to liying to ourselves , you are not even wrong , because at the end of a process we may effectively begun to lie to ourselves before realizing we have taken the wrong starting point to accommodate us at the times and then  refusing to admit that we had taken the wrong road ...Then lies may be implicated at the end of the process but cannot be used to give a definition of the process itself... I know that you know that ...

As in a marriage for example , we lie to ourselves at the beginning (if it is a confirmation bias ) not at the end generally even in this totally psychological situation ...😁😊 but the choice of an audio product do not begun generally with a lie to ourselves if we mean to speak about biases,  which we cannot eliminate anyway because it is in most case the starting point ,  and the process of confirmation all along the road  linked to them . Biases are not lies, biases can even be positive and in spite of that  inducing us on the wrong road.. We can become conscious of our biases. Refusing to taken into account our biases when and once they become conscious is  then lying to ourselves.

Then when you said ,it does obviously, you proposed to define the possible end result of an objective psychological process road to be a mere lying process , this is an erroneous definition as the wikipedia definition demonstrate it evidently ...

You are probably a good corrector but a way less good thinker...

Confirmation biases has nothing to do with "lying to ourself" in particular or specifically

Yes, it does, obviously.