I'm more tech and scientific minded myself. While it makes common sense that more of anything (larger cable with more metal) would be better, I'd like to see empirical data showing this to be true.
For years people have sold snake oil to every industry by convincing people they needed to buy this or that. Then the so called "experts" and pundits step in and support the theory blindly. I'm always going to be skeptical unless faced with scientific data...not theory.
The other thing I think is missing is the reality I would think that the right answer is "it depends". I would think if you had completely ultra high-end everything then yes connecting everything together with high quality cabling makes sense. A good example of this is network cabling. Though Cat5 cabling might look like Cat6a cabling they are vastly different. Cat5 will probably top out at around 1GB of data max while Cat6a is rated to 10GB. Obviously the ability to carry more data signal is a direct relationship to the cable itself and it's shielding.
But like the Cat6a example above, what if the rest of my network can only perform at 1GB or less. Does it make sense to have Cat6a cable? Maybe...maybe not. If I can only consume 1GB or less then the Cat6a is overkill even if it does make me feel better.