Right hand for eating, left hand for ‘unhygienic’ tasks.
Nothing wrong with it as long as you wash your hands properly before you eat, and on the contrary..it is more appetizing, as you can manoeuvre better than utensils with certain type of dishes served.
Customs & cultures vary throughout the world. It would be wise to embrace them, try them out, and respect them even though you might find some of them weird. Life is short. Live it. Don’t be a snowflake.