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
So now we have evidence that was routinely decried as lacking that some engineers know that fuses make a difference and now it's turning into a meme that we need engineer naysayers to battle it out. 

This is a fool's errand. It looks like anytime something valid is brought up, it's pushed to the side and new demands are made.

It wouldn't surprise me that there's a whole bunch of engineers who know that fuses make a difference but choose to stay mum on the topic.
With social media being what it is, what's to prevent trolls from following and slandering engineers on their products sites, personal forum sites, and the like? I can easily see some here doing just that, and they'd do with with glee. I, for one, wouldn't want them to follow me anywhere save for this site. It's bad enough as it is.

All the best,
Nonoise
Post removed 
Again, proof that once something valid is established, it's off on another laughable tangent we go. Where, in that video, did Paul McGowan pander to snake oil? Or Steve McCormack for that matter?
Exactly nonoise!  My experiences with Steve McCormack have always been based on what is heard not a belief, myth or fable. He engineers a solid design and chooses each capacitor, resistor, wire, etc. to maximize the sonic performance of his gear. I wouldn't want to own components from designers that would do otherwise.  

My guess is that a great number of equipment designers take wires, fuses, directionality etc. into account.  As Paul McGowan said on that video, He's an audiophile too!
Just to be clear, there was no "proof" of anything.

A fuse was changed and he heard a difference. Resetting the original fuse with better contact may have produced a difference as well.

Almarg and Atmasphere have both stated this I believe and that is consistent with my experience as well.

Again that’s not to say all fuses are created equal and some may in fact work better than others.

So the truth as in most cases is most likely right square in the middle and extreme views or blanket statements do not cut it.

Expensive products with nothing to back up extreme claims should be questioned. Those who object are helping nobody but the vendor. Personal attacks should always be right out. The usual high end audio story.