Some of them are. They do tons of stuff. Amphenol/Neutrik connectors are also their forte.
A lesson learned from the guitar hobby, a shitty cable typically rolls of the highs. In the same hobby, I have a Fuzz pedal (typical Nirvana crunched guitar sound from 90s) that is literally a AM antenna. And there is always someone preaching whenever I engage that pedal. 
In the audiophile hobby though, the worst I have ever experieced was Electromagnetic Interference (EMI). Here is a simple test for the folks using single ended connections:
Other than that, I haven’t heard any other issues myself. I assume that is a good thing right? 