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?  
What’s sad is they, like you, are ignorant of fuses. Obviously. Obsessively circuit oriented. It doesn’t take a weather man to know which way the wind blows. Wake up and smell the coffee!

Ooo, getting testy there Geoff, your calling the most influential designers in audio "Ignorant", I don't think it's them, but I'm sure they'd have something to say about you.

Cheers George 
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I didn't usually like to get involved in your and Geoff's love fests, but your statement about hospital grade outlets is incorrect.

From UL:  In addition to complying with the general use requirements, hospital grade receptacles are specially designed and are subject to additional requirements of the standards. These include additional grounding reliability, assembly integrity, strength and durability. 

As you can see, nothing about being explosion proof. All the literature indicates that hospital grade outlets are mostly differentiated from general use outlets by more robust construction and greater clamping force.

Carry on. And maybe don't be so quick to accuse Geoff of making stuff up when it seems you are not completely innocent yourself..
I've recently changed my mind about Special Fuses…I used to think they were useless and silly "faith based" tweaks, but now I think purchasing those things could be a sign of some sort of insanity so my compassion tendency kicks in (or maybe it's just "Holiday Spirit")…they're still useless and overpriced nonsense, but the purchase and utilization of them could simply be an uncontrollable act for some, and that's OK…if Ted Denney would donate the million bucks or whatever he's making from these things to Faith Based Tweak Compulsion Syndrome (FBTCS or "fubtucks") deprogrammer therapists, it would be a win-win.
Another contributor recently called such snake oil gear a deserved tax on the stupidity of the rich. I can assure you that not all rich peope are stupid, but there are obviously quite a few suckers among them.