I don't get it. People with over 400+ win (also losses) still in silver?

At what point is it just pointless to play ranked.... when you silver 3 over 400+ wins (And losses) and not really gone anywhere? what the actual points its clear you wont go higher so why even try? I guess people will say 'For Fun' but then isn't normals that same as your not going anywhere in ranked.
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