Having the ability to edit runes in champion select

Just like you can edit you're masteries in champion select i fell like it would be a great thing to be able to edit runes in champion select. I don't know why this option is not available yet, maybe because it would allow you give you and advantage which wouldn't be the issue if everybody could do it. If you have a rune page with lets say two mages and you have no magic resistance and a teammate does that gives them an advantage over you which wouldn't happen if you could edit runes in champion select. On behalf of the Just® Team please upvote this so Riot can hopefully change this.