Two questions to make you mad.

@texbychoice 

Nearly all electronics (not electrical) changes AC to DC. After the power is changed to DC the AC part is done, yes the transformer, rectifier and down powering circuits are important but any audiophile grade AC to DC conversion is easily done the the filtering is applied to the DC circuit. 
 

the ASML doesn’t work on raw AC it works on DC and those engineers don’t feel that it’s important to use very expensive boutique AC cables with things like insulation bias and other such nonsense. If these AC cables did make the usable signal more accurate don’t you think they would use them? Im using this example because this is the most expensive and accurate machine in the world that is manufactured. If there were invisible advantages to audiophile AC power cables don’t you think they would be tested and used when the need for accurate is so important. Intel couldn’t make 5nm chips a few years ago and it nearly bankrupt the company, money is not in the equation of chip making only accuracy and the engineering to make it happen is and they don’t use special AC cables. Hope my argument is clear.

One could argue that rain is just excessive humidity, therefore an umbrella is not necessary. 
 

Deniers can rationalize all they want that cables do not or should not matter but they do. 

What you fail to understand is that " accurate" in an acoustic perceived experience way cannot always be reduced to "accurate" in an electrical way by a limited set of electrical parameters among all possible ...

Human ears are trained by evolution to identify some qualities relating to timbre experience be it speech recognition or natural sounds, or musical one etc , This timbre experience acoustic qualities may be related in some case to the various parameters and material composition belonging or beside or near the vibrating resonant source and affecting it ...

Very simple experiment :

Put a big chunk of shungite on an amplifier...

Or try a big chunk of quartz...

Then try it many times and you will feel the difference with a music piece ...

Even if your electrical measures tool set will not detect any change in the amplifier specs you will hear a more compressed sound or a more meaty one with the shungite chunk and a more "clear" or less compressed or more high frequencies oriented sound with the quartz ...This is caused by the very different composition of these minerals affecting the playback system in such a way as impeding or improving the soundfield and timbre experience for the EARS/brain not for your measuring electrical tools... 😊

The fact that shungite work always in his way and the quartz work in his own opposite  way is an OBJECTIVE fact...

If these AC cables did make the usable signal more accurate don’t you think they would use them?

@donavabdear The ASML system must be accurate and precise. There is far more complexity involved in that machine that has nothing to do with cables.  Semiconductor fabrication does not hinge on cables as you want to argue.  Intel production problems had nothing to do with the type of AC cable in use.  Sorry, your premise is totally lacking in substance to provide any value to the audio hobby. 

@texbychoice 
Ok you win fancy AC cables have nothing to do with accuracy in an electronic signal.