The post above you did say clown but it also had a fair bit of reasoning and substance and so do many posts before that.
You are just selectively reading stuff.
Because I didn't really want to delve into the discussion with people of completely unfounded opinion based on infantile belief that every captain absolutely has to have an IQ of a football Einstein. Sure, helps, but isn't a necessity or a leadership quality itself, just a personality trait. Leading, by definition, means people need to follow you into fire, and does NOT involve telling them where exactly they need to be and slate them for doing otherwise in a perfectionist fashion of an intelligent man (like Xavi did for instance). Being an example on the pitch itself does NOT necessarily make you a good team leader when in fact you have a fairly timid personality, unless you're being outspoken and vocal to cut through the PC media bullshit and stay completely loyal to your team (see Iker/Raul/Iniesta as partial examples to that). Ramos does that in his own way, via bailing the team out when they need a lift from an unexpected source, or being there to be called upon when needed as well. No need to believe me, just read what his teammates think of him, be it RM or Spain.
Best examples of captains are Puyol, Lampard, Giggs, Pirlo. Basically those that found a perfect balance between being an inspiration, very smart approach, loyalty and without being a complete cunt. To be a perfect captain you need them all, but to be a leader in captain's role, you only really need one of these traits.
Also, it's not correct to say vice-captains should not be credited for the team's success. If you look anywhere in history, every team that had been a top side in Europe had a solid group of captains, vice and third captains. And that's because where one fails, the other one picks it up, because each one has different traits. Different types of leaders. Exactly why United locker room stayed disciplined for so long during Giggs/Keane/Neville/Scholes era, almost every one of them was different. Similarly, Arsenal had Seaman/Lehmann/Vieira/Bergkamp. Chelsea with Terry/Lampard/Carvalho/Drogba. Milan had Maldini/Nesta/Pirlo/Gattuso/Inzaghi. No need to go through Barca's. And partially why Madrid captains failed to take charge in a locker room full of egos, exactly where senorio approach backfired.