The truth is I have recabled many headphones and can say from first hand experience that it the best way to do things and sounds best in my opinion.
There is a most definite difference as to wether you think it is better is a personal opinion. I guess unless you have tried it you wouldn't know. So many times wisdom would reserve a thought until they prove it by actually finding the truth by hearing it for them selves instead of just thinking it couldn't possibly be true because I don't think it makes sense.
I think alot of the new headphones have removable cables because people like something to fuss with. And others like making money off others mis conceptions. We have made things far more complicated then they need to be. Just some thoughts from someone old enough to have seen and made some mistakes of my own and see others doing the same.