I have a good friend who is a wine consultant, he flys around the country helping folks dial in their wines with chemicals, wood, micro dosing etc. and he has a saying about wine;
how do You do if a wine is good??
If You like it!!
I'm lucky that I get to partake with him every now and then, and every time I do I learn something about different styles and the little subtleties that they possess and I've learned over time to appreciate these differences and except the fact that although I may not prefer one wine over another, it may infact be better to someone who is trained to experience these differences. The moral of this perhaps is that some folks are very content with some average belden cable, but perhaps, just maybe there is better if you have the willingness and system to appreciate the differences that some cables provide.
Unfortunately, most folks in this hobby are very attached to their gear and system ideals, and feel the need to protect them at all costs, at the end of the day, do what ever you think is right for your system and your ears!!