Why don't amplifier Companies use high end fuses?


My equipment - Raven Integrated Reflection MK2 tube amp 58wpc. / Lumin A-1 DAC Streamer / Synology NAS / Isotex Aquarius Power Conditioner / Furutech Rhodium Plug / Sonus Faber Amati Homage Tradition speakers.  

I have read thousands of comments on upgraded fuses improving the performance of sound.  I am very open minded but not sold either way.  So, the question I have is....if fuses were so important, than why don't Amplifier companies all install them as OEM equipment?  To me, if they are as good as people say, that would provide companies who use them a competitive advantage?  

Every High End Audio store I go to in Phoenix have told me it does not make a difference and is a waste of money.  For the record, I have fuses purchased at an automotive store for under $10 and I think my sound is awesome.  The Company that built my amp tested the Synergistic Fuses and he emphatically said there was no difference.  

If I were to try a fuse for fun, given my equipment, what would your recommendation be to try?  
willgolf
Just when things were starting to get a little dull they put up new duckies on the shooting gallery. 🐤 🐤 🐤 🐤 🐤
Ear witness testimony just to like eye witness testimony is often wrong, and people hear what they want to hear based on the amount of money spent on cables, fuses, power cords, etc.  Why do you think the big magazines never to an A/B test with these expensive add ons?  
Waste of money . I don't think you will hear a difference in voodoo fuses or magic clocks or super expensive cables . But hey , its our hobby , so if you have money that does'nt interfere with monthly bills , have fun !
When I start listening to the difference sound for which direction I installed a fuse, I'm not listening to music anymore. I'm searching for extremely subtle changes in sound quality that may or not even be there, but certainly ignoring a great set of chord changes, a terrific session with a piano, deft fingering on a violin.

I like music better than sound. I guess.