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
Post removed 
@wolf_garcia 
You forgot about Geoffkait's magic directional cables! Glad to see someone else calling him out for exactly what he is. 
the sky is blue because of Rayleigh scattering


not surprisingly, science has answers for that as well as fuses
@nonoise 
If a fuse in a signal path is truly that weak link and manipulates the sound, wouldn't a more eloquent solution such as a relay be more appropriate? Someone designing a piece of gear selling for several thousand dollars can't pony up for a $3 relay? Or better yet, ¢10 for a BJT to bleed to ground?
@kosst_amojan, 
I believe you're right. As to why they don't do it is beyond me. As I recall, Ralph (@atmasphere), uses something better than fuses in his designs. Until they start doing it on a regular basis, I'm going to stick with the better made PADIS fuse as it does sound better to my ears.

All the best,
Nonoise