Why do people care so much about their rank?

I do have to ask this. Apart from the pro players who have worked very hard to get where they are om this game, most normal people will never see pro play so why do people care about their ranking so much. Especially since ranks are constantly in flux due to the fact that people bandwagon OP champions and then when Riot nerfs them, they don't have anything else to play and their rank begins to drop (Not saying everyone does this). Is it really that important to you, to be a high rank? Does it make you a better person or give you some meaning to your life outside the game? So why do people care and constantly beat others over the head with it? EDIT: Seems people don't like to hear the truth. But thats fine, I expected some resistance to the notion that ranking is pretty irrelevant in the real world.
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