What do you expect them to do? Individually kiss your royal behinds? Smile at you and you alone and tell you just how special you are just because you happen to be sitting in Seat 64K? Please, theyr'e in a service industry catering to the needs of 400 passengers in a metal tube at 35000 ft. Its hard to keep smiling when you have drunken jerks, slobs expecting First Class service while having paid Coach fares (which SIA quite often delivers) and unappreciative passengers who criticize you for smiling. But, Bless their hearts, those Singapore girls just keep smiling and do their jobs. It may be robotic to you, but its professional courtesy and standards to most people. If you want heartfelt love and devotion bring your own chaperone or nannies on board. Or else fly any one of 100 other carriers where you will get sincerity of the "Get Lost" kind. Frankly, a smile at the end of a 22 hour flight really does go a long way, even if its been mandated by the corporate headquarters of SIA.
Atheism is Myth Understood.