You'd be surprised.
You haven't seen people on the boards whining about how some enemy Fiora just mashed Q at them and killed them, despite X Y and Z outplay (even if the scenario is obviously untrue), and rather than calling out the legitimacy of the claim, someone says Fiora's supposed to do that because "She's THE Grand Duelist"?
Because I've seen that plenty of times, and while they don't directly say she should be able to 100-0 without any realistic counterplay, saying 'she's supposed to do the extremely questionable thing that whatever whiner said' instead of refuting the legitimacy of the claim is implying that it would be okay if she was broken simply because of her title.
In fact, when she WAS legitimately broken about a year or two ago, people were still trying to use that argument to justify her state.
Someone uses her title as justification for someone's complaint claims in most Fiora threads, whether the thread itself makes a legitimate point or not.