Eating like a slob at home on your own time isn't the same thing as washing your hands as you are required at your job. Also I am pretty sure adults who were raised to wash their hands as kids were do not abide by such as adults when they become fat losers. Also who's to say Zohran doesn't wash his hands? Also eating with chopsticks isn't common in America but Asians are allowed to do that and can't be forced to use a knife and fork if they don't want.
If we allow fat slobs who eat a cheeseburger messily without washing their hands after shitting, I don't see any issue with eating rice with one's hands even though I would never eat it like that. You have no right to tell people how to eat you fascist.