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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Uh, that can’t be right. No one has ever lost an amp or burned their house down due to an aftermarket fuse. Not in 20 years. Not to mention stock off the shelf fuses like Littelfuse fail as often as aftermarket fuses. Besides, some aftermarket fuses like Isoclean have always been UL approved. Didn’t you get the memo?
it's like power cords, easy to change yourself, so rather than ad cost for a part you might not want, they use cheaper ones and let you choose your own upgrade...or not
Exactly! Besides from what I can tell audiophiles are very particular about which fuses they want. So it's a lose/lose situation for the manufacturer.  Ditto audiophile power cords. Why should audiophiles trust the ears of the manufacturers? Now, if the manufacturer is smart, which he probably isn't, he would use an aftermarket fuse in his amps for the shows. You know, to get a leg up on the competition.
Same reason MOST companies don’t supply NOS tubes for stock ... matter of personal preferences, no best! Let owner decide/roll for themselves.