1) I don't like most people, but I like almost every single cat I meet. Babies can be adorable. They can be tiny and sweet and make tiny, sweet noises and they have such little, chewable feet. And then their noises get louder and their feet get bigger and they become people, and you might find out that that teeny, tiny, adorable baby has turned out to be kind of an asshole. Kittens are also tiny and adorable, and then they grow into older cats, who are still pretty small and pretty adorable. If some of the cats I've known had been people, I might not have liked them one bit. But they weren't people; they were cats. And so the reasons I wouldn't have liked them if they were human are expressed in totally cat-ly ways that I find fetching or perverse or a bit quirky, but always completely enchanting.
3) You're allowed to keep your cat shut up in the house all the time to keep him from harm. It's not that I don't love children. One of the reasons I don't want children is that I would love them in such a neurotic, smothering, terrified/terrifying way that as soon as they could, they would move to Paris. If I had a child, I would worry constantly and unhelpfully about food additives, and cars, and diseases, and chlamydia, and disappointments, and the things they put in plastics that make fish all messed up. If I tried to keep my child inside, if I told my child, "Nope. Sorry. There are too many hazards out there - get friendly with this house because it's where you will be spending THE REST OF YOUR LIFE," some interfering friend, relative, or neighbour, would undoubtedly interfere.
If you tell your cat that the one-bedroom apartment you have will be his only kingdom until death, your cat will a) not understand you, because he can't understand a huge number of words, and b) without realizing it owe you a debt, because you're making sure he won't be hit by a car or get stuck in a tree or get some kind of horrible raccoon-borne plague. Your friends, relatives, and neighbours will not care one bit that your cat can't go outside, or that you worry so much about your cat going outside, and the only thing you run the risk of is that they'll talk behind your back about how the reason you love your cat so much is that you never had any children.