Power cable education needed


Hi everyone. I need some education on power cables. I have been reading that a good power cable is vital to a good sounding system. If that is true wouldn’t the companies the make the components include a good power cable to insure their product sounds the best that it can ? Should I evaluate the power cables in all of the components in my system? 
ronboco
People that claim to hear a "difference/improvement" with a different power cord are deluded. The sound of an electronic component starts with what comes out of the power supply. Not with anything before it!
Would your car have improved gas mileage if you used a custom hose to fill up the gas tank? Same thing applies to power cords, wall outlets, power conditioners. 
"...the quality of the power cord matters just as much as the quality of the power amp." - this from mc who is an anti-science proponent of useless/waste of money tweaks.
Ditto for "audiophile-grade" fuses! Anybody like Ted Denney that can sell painted fuses for hundreds of $$$$ has got some balls!
So then can you please explain to me what these giant power cords bring to the table? I purchased a couple and I couldn’t notice a difference. I’ve got good hearing and approximately 50 K in my system. I’m trying to figure out what a $10,000 Power cord brings to the equation. I’d love to have an explain to me. Thanks

Come hear the ones I have. When you scrape your chin up off the floor take a minute to regain your composure and then explain to me which you would rather have: that sound? Or the explanation?