First, your family know what you eat. I meant that if you have allergy with something or you can’t eat specific thing like spicy, your family know that and they can put that out in your dish. But if you’re in a restaurant even if you told the waiter to put out, most of them usually don’t listen to what you say. So when the dish come out and you can’t eat it, it will be a waste of money.
Second, the food at home is much cheaper than the food at the restaurant. For example, if you eat a bowl of Pho at a restaurant, it will cost about 30000 dong at least. But if you buy the ingredients and make it your own it will be way more cheaper about 10000 dong.
And helping your mom with the food is also fun thing to do.
Third, that your family knows your taste. Somebody like to eat fried egg with onion, some like to eat with tomatoes. Because we’re family so our taste might be the same so your mom can easy know your taste. Furthermore, the one who cook a lot or a good cooker usually have a a secret cooking technique of their own that you can find no where else.