Chillax man, why so aggresive lol? For any football club and fanbase this is an important and sensitive point of discussion, even in your post you start with mentioning how irrelevant it is and then went on to reffer to previous legendary captains of the club and that it actually matters if you have world class players leading by example instead of average jabronis staining the legacy.
No, make no mistake, it's pretty irrelevant --- and yes, there are no legendary players that can symbolically be the captain and represent the club, so who cares anyway.
It's the same argument I'd have about Pinsoglio. Whoever the #3 keeper is just doesnt matter. I'd hear how important he is to winning because he brings great chemistry to the locker room. But as soon as Juve stopped winning, all of a sudden, that leadership and chemistry doesnt matter.
Whoever wears an arm band during any game will have zero impact on the result of that game. I'm more interested in finding and developing the talent that would one day become worthy of symbolically representing the club with an arm band.