There are 2 reasons I could think of. 1. Climate difference. It's much hotter and much more humid = Foods gone bad much quicker than in Western countries. 2. If someone's in chemotherapy, you can only eat something individually wrapped. My family found it so difficult to find the snacks she could buy and eat the the UK. That's what "I" think, but, I know many would comment back to me with "But still bluh bluh bluh..." 🫠