Hand luggage? What is ok to take with you, and what isn't? A ladies handbag, of indeterminate size? A 'personal item' as defined by some airlines? A laptop? A small zip bag? An IATA approved cabin bag?
The airlines require you to take on board all your valuables (they refuse liability for valuables in checked bags), your documents and your medications.
They ask you to leave these behind in an evacuation with no knowledge of if or when they will be returned to you. Obviously returning property will not be a priority after an incident.
On the other hand there is no suggestion that in this incident the selfish bar-stewards actually caused any delays, damage or other problems during the evacuation. (I am not saying this didn't happen, just that we have not learned that it did). I can't recall mention of any problems with other recent evacuations.
Is this really a problem?