That's true. I don't have time to waste for poor cable either.
But my counter point to that is, just because something is sold by first class vendor, made by top notch manufacturer, in USA, and is new, doesn't guarantee it's a good product either. I've personally ran into few adapters that were bad. It must have been a batch failure because 80% of what I bought that time were bad. It was an Amphenol bought from Digi-key. Of course, as soon as I notified the vendor, my money was quickly refunded.
But that told me this. Never to trust anything without checking myself first. I should have known that, too.
Since that time, for anything that matters (pretty much every time if I even cared to measure that), I check cables. If the reading doesn't make sense, I check cables. Known bad cables are promptly marked and thrown away or repurposed.
Of course, I did get some bad stuff from China. I've thrown them away, send complaint, and forget. Sometimes I get money back, sometimes, I don't. Stuff are cheap enough, I'm actually ahead.
If I am working with something I have no way to verify, yes, I buy products from good dealer with well known names. That reduces my rate disappointment. I still have to remember, most everything we get these days are made off-shore. US manufacturers don't verify every one of them either.
An interesting world we live in these days.