[BUG] or not? A really old thing with Champions in "Profile" page

Bug or not?
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Just watch the video and it should be clear to you. I know this is an old thing that me and my friends used but ain't this a bug? I mean if Riot allowed us to see other's champions and their mastery, wouldn't they just let us use the "Champions" button on other's profile page? Just no hate pl0x and sorry for the bad quality, dunno what happened {{sticker:zombie-brand-clap}}
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