Due to uprising obesity, people are researching on Asian culture on eating food by hand.  I could not get your point which direction you are pointing it. I am trying to put some good points on use of hand.
     1) When we use our hands we play foods with fingers and it's nerve sensor has direct connection with the brain interact differently b than the uut positively. 
   2) When you use hand we eat slowler than utensils. .
   3) Brain takes time to use its sensor when you are full and when to stop, it has direct positive relation with metabolism.
Along with hand eating and Asian spice combination body gets essential ingredients,  you name it. Should not be shame on our culture as well should not hesitate to embrace new things as well. But you should know when not to use hand.