You keep coming up with this strawman that Jean is personally responsible because she ignored the safety briefing and didn't read the card. How do you know?
The fact is, everything addressed in the safety briefing Jean, as far as we know, got right. She was conscious, so presumably was wearing her seatbelt when the plane braked & succesfully didn't get knocked out. There's no evidence she stopped to collect her handbaggage. If she put her lifevest on, she obviously remembered not to inflate it inside the aircraft since she got out of the exit. She identified the exit closest to her (of this we can be fairly sure, since the overwing exits are nobody's 'natural' route given a choice,) and took it.
The safety briefing stops there. I have never heard a briefing that told you what to do once you are out on the wing. So on all available evidence, she understood and followed every letter of the briefing. It Was Not Adequate.
As for the card - they are a mishmash of unintelligible iconography designed to be understandable regardless of language but the reality is the opposite. Even if you know what you are looking for, it can be hard to identify details (as someone else mentions, I've seen a card where the flaps are coloured the same colour as, and look a lot like, escape slides.) If you don't know what you're looking for - and how many passengers do you think it occurs to need to check if their particular aircraft has overwing slides or not? - then it's like a Where's Wally cartoon; obvious in hindsight but not so helpful in an emergency.
The fact that most people seem to manage to handle the situations addressed in the safety briefing but then get stuck at something not mentioned in it would seem prima facie evidence not that passengers are idiots that ignore the briefing, but rather that the briefing does work but should be updated to address the real issue of people not knowing how to get off the wing of an aircraft.
If time is the issue, maybe the facile bit could be dropped that in the event of finding yourself in the middle of the atlantic with impending hypothermia an extremely small whistle and light are going to be any help.