SIMRAN
MONTREAL76 is right they are very picky , as of the people you are describing well maybe they knew how to stand out from the crowd personality wise , that's what emirates are looking for , plus it's an open day most people don't get an invitation and they don't really know how to dress for the event but i'm sure they must have excellent skills and customer service experience one in finals they explain to them how they expet them to be dressed but i did not experience that in my open day all the people chosen for finals were dressed professional business attire .
Sorry to hear you didn't go throught but it shoud'nt be a reason for you to give up try try and try again if you really want it
good luck
P.S: anyone who received the medical email can you please forword it to me , they said mine should be there by monday but i would like to see what medicals exactly so i can start booking appointements at least inbox me please thank you in advance