To be honest as the end of a long flight people are probably so tired and it's been so long since they heard the demo ore takeoff that they should always be reminded to locate their nearest exits, review the safety card and if an evacuation becomes necessary to leave all hand baggage behind. Its the same on holidays flights too when people are more concerned about the beach/hotels/sites they've been looking forward to for months and that's all they're bothered about on the approach, particularly if they've had a couple of drinks onboard.