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

Belden certainly publishes all the standard measurements with their Iconoclast cables.

Mr. twoleftears

Belden make so many cables, of different AWG.
Which one is the one for me, for you or for some other?
Which of the data published, is the one (or more) I need to look at to make that choice?
What is my system’s parameter, that would make me pick that one?

As you have no idea, nor others, nor the cable makers including your admired Belden, you offer in every post of yours, What good that data is for you?

Which one is the one for me, for you or for some other?

As I said before, do the math.

A great problem in audio is ignorance of even the most fundamental concepts which makes consumers easy prey for charlatans. I might tell you what I have and why it works for me, but any recommendation with out hearing your system in your space is idiotic. IMO, this is what gave rise to burn-in.

Far too many systems are nothing but HiFi Jewelry and completely incapable of presenting a reasonable facsimile of the source material. Badly flawed source leads to badly flawed systems. You may like but a 6 foot hi-hat or solo vocal extending from speaker to speaker, but they are grossly wrong.

EVERY SPECIFIC RECOMMENDATION ON LINE IS WORTHLESS!!!

Then why are you here, to thumb your nose at people for ignoring those words of wisdom? You must have something much more important to do than saving our poor souls from audio purgatory. 

I’m not thumbing my nose at anyone. I’m a retired recording, electronic and software engineer.

The first thing an engineer does is get the requirements. I flew all over the world to have a look-see before making recommendations.

So when JoHiFi recommends his XYZ, without knowing anything about a room, the other components and user peccadillos, it just useless 0’s and 1’s.

Case in point: "The Naim series like the nd5xs2 is great at about 3500 ( I own one of these), and the Araulic Vega series, g1 is about 3500 I believe and I Just purchased their g2.1 which runs 6900.00. Both those are very easy to use also, which is important to me." So said speedbump6 in https://forum.audiogon.com/discussions/can-anyone-recommend-a-good-streamer-dac

To be fair, originators of "Can anyone recommend..." deserve the nonsense they receive. Most of these topics contain "I can spend..." and ZERO about music!!!!