When humans domesticate animals over time, we 'design' them to be useful in the way we need them to be.
Horses for heavy work and also leisure and sport.
Dogs for companionship and protection.
We basically invented dogs as we know them now. Would a French Bulldog or a Dachshund ever have evolved naturally in the wild?! No. We wanted them like that so we bred them for those characteristics that were useful or attractive to us.
We needed cats to kill vermin to protect our grain stores. Over thousands of years of farming and agriculture it suited us perfectly for cats to be semi wild and excellent hunters.
Now that in the last 70 years we have supermarkets and packaged food, you want to reverse those thousands of years and turn cats into useless toy pets. Maybe that's possible if you have a Persian cat or some very overengineered vanity breed. But your basic moggy is going to be really upset and distressed if you keep it locked inside. It's not benign negligence to let a cat do what it's been bred to do and comes completely naturally to it.
The relationship between cats and humans is not the same as other types of animal ownership. It's a unique reciprocal arrangement where you both live side by side and one does not dominate the other. (If anything, the cat dominates the human!) Just because you can acquire them as property through legal or financial transactions, does not mean you have the right to - or are indeed able to - control what it does.
If you decide to get a cat, you basically sign up for the attendant risks. When we got our cats I said to the children, you realise one day they will break your heart? That's the deal.