if you get 6/10 in any exam you've done badly - I'd say an average performance from a player in a top-of-the-league should be around 8, or otherwise you are underperforming
saying no-one can be 10/10 just shows the absurdity of yoru standards - what's the point of setting a top level you don't believe can be met? you should be giving people marks out of 9 instead