Quotes weigh more, or entirely, on the fame, sacredness or charisma of the subject of attribution, and hence, they are trying to make people regard them with reverence, awe, and respect, than to genuinely prove an accuracy or truthfulness.
Arguments are faceless, heartless, respectless, string of reasonings being developed into the shape of an opinion, which is accumulated on the previously proved opinions (theorem). Unlike arrogance of quotes, modesty is a virtue of arguments', which is the result of it, whereas errors are always probable during the course of reasoning