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
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If ya don’t know I ain’t goin’ to tell ya. It’s for me to know and you to find out.
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There is a relatively new product called Anti Vibration Magic, which works. The painters tape mimics the same effect. A buddy of mine uses black electrical tape ( which comes in many colors ). AVM is quite expensive ( imo ), and is used by a few high end audio manufacturers, and is very popular in the diy community. A long, long time ago, I was one of the 1st ( that I knew of ) that used mortite, under the platters of direct drive tts. At that time, I had a friend who was an engineer with Nakamichi, who told me about a simple and easy tweak, that I have been doing for years ( similar to AVM ). This tweak was to use a non glue, waterproof, silicon sealant, available at your Lowes or HD ( even Walmart ), and with a tooth pick ( or something like it ), apply to areas within a component. Wiring, capacitors, circuit boards and the chassis. Caveat : MUST LET IT DRY. It is all removable, and, can be quite messy. But, incredible improvement. This can be for the same purpose as adding a piece Dynamat ( or similar product ) to the underside of a component lid, to dampen vibrations. Anyone who feels I am looney ( kosst ), I do not care. Never knock it until you try it. MrD