Leafs why do the many high end speakers provide bi-wire design? Single wire designs with elaborate internal crossover designs can be excellent sounding speakers, the speaker manf has decided for you that $500 single cable is better than two $250 cables, just a different design philosophy. Both approaches can produce great speakers, no need to say one is absolutely better than another.
I accept both as valid solutions, with bi-wire designs you have a choice, let the customer do it his way.