No need to get personal. I travel very regularly as a SLF on a wide variety of airlines. EI is the only airline that feels the need to make this specific reminder, and as I mentioned the very people it is aimed at are the ones who are least likely to pay attention to it.
On an early morning flight with LH earlier this summer the only PA other than the safety demo was three terse words; "boarding is completed". If it works for the Germans, then why not the Irish?
If I'm reading your post correctly, can I assume that you'd be quite happy to spend a flight (lets call it a long haul one) with the safety demo playing on loop? It would be, after all, for passenger safety.