The size and mobility of living things just do not track with ease of care at all. Fish? Pretty stable, stay where you put them. Incredibly complicated care, major investment, huge undertaking of regular maintenance, giant commitment. Cat, kind goes anywhere, usually larger than fish. Maximum ease of care, set out food, pick up poop, keep inside, enjoy. Plant? Just sits there. Weirdly complicated about every little detail from daylight to pH, longer commitment than fish, requires regular checks, lots of work. Completely stupid amount of difficulty from the poster child of not doing anything. Babies, much less mobile than anything, often smaller than the cat, same thing a cat needs, food, poop removal, but suddenly it's a five dimensional game of psychological warfare against yourself and what kind of memory of parenting you're going to be 25 years into the future for a bag of screams that can't sit up. Unbearable amount of time investment and care commitment. Don't give people a baby for a gift, they'll go steal their own if they want one.