But unfortunately the media have chosen to give air time to a man who is saying that the O2 generators had failed because the bags didn't inflate. So now we will have pax who think that the bag should inflate because some previously unknown rambler on TV said so.
At the end of the day, crews are highly trained for these situations, passengers are NOT!
And crews are also trained to understand this fact. Hence why we try to give them pertinent information during flight to try to keep them at ease and comfortable (e.g. clear air turbulence or after a missed approach). Unfortunately this is generally not possible during an emergency because we are busy making sure that the aircraft is under control and in a position to make a safe landing that everybody walks away from.