Can you help me understand why that would be a reason to compromise the comfort of the cable that is supplied for a device which charges at 5w?
Or, why Apple manages the same in half the footprint?
Or, why someone would expect that a cable that came with a pair of headphones actually charges things at over 65w?
Like most things in the audiophile world, it's more about aesthetics than anything else. A big cable looks like it means business.
I think that's being a bit uncharitable to B&W specifically; they're one of the few headphone companies where the engineering does back up the price. The cable is the odd one out.
I don't have an informed opinion of B&W either way, but are you sure it's not an instance of Gell-Mann amnesia?