It's not meant to make people care for them any better... it's meant to curb impulse purchases made by the kind of people who only want to take a single chick home to make a cute easter themed youtube video of overprivileged kids receiving a cute baby chick or duckling for Easter without thinking about what they are going to do as their chick grows.
It is meant to reduce the number of abandoned chicks and ducklings found in shelters and local parks after they outgrew their cute fluffy chick/duckling phase. It is meant to reduce the number of chicks that are raised in relatively unhappy isolation from their own kind. It is meant to reduce the number of chicks and ducklings that succumb to coccidiosis, exposure or other forms of ignorance and neglect based abuse issues because the people who buy them for the Easter gift thing are typically abject morons who are barely capable of raising their own human child, let alone a baby chicken or duck and can't be bothered to educate themselves in advance of or after their purchase.