Why high-end cable manufacturers don't post measurements?

Mr.  auxinput

It is no religion. It is science. Once you will be able to tell the difference between the two, and be willing to try it (religiose won't, scientist would!) you will no longer stand in the shade and go against everything you don't know. 
You try to say "NO" on something you never tried, nor understand, just because it may collapse your entire world.
A world based on superstition and industry lies for decades.

b4icu:
bewildered 4 i can't understand?

A/C signals react with LCR. If they didn't, crossovers would not work.
L & C are squared terms, R is linear.
Your cables have MASSIVE L & C and are thus tone controls.

Damping Factor is DC.

Mr. ieales

I know music is AC. Those who claimed that their cables are directional don't! What a shame...
On the analysis, when looking from the Speaker side, back into the Amp's output, through the cables - the Speakers are insignificunt. 
They are not part of the deal.

Now let's take a twist on the subject:

You never tried my idea. NEVER!
You have no idea what it sounds like.
What improvement it does.

But you still nugging about every parameter you can grip, just to go against it.
Why?
Those who tried, still have a pleasant smile on their face and enjoy a way better sound.
So what is your mission or drive?

So what is your mission or drive?

Protect the uneducated from charlatans.

the Speakers are insignificunt

??? You can't be serious. 😳