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
Good to know you have friends in high places, I have got ears...
Apology accepted

So this guy measured an audiophile power cord that cost $20 on Amazon, why not test something like shunyata's lowest line power cord?
No co is giving great cables for free be a sport get great aftermarket cable like Purist,Tara,Shunyata etc.
What does your $10,000 power cable do?

"It makes your system sound better".

How does it do that?

"Trust me."