Think of owning a domestic cat as like having a car. It requires some care and responsibility, but most people can manage it OK. Having a small cat like a bobcat or a serval as a house pet is like having a private plane like a Cessna. It costs a lot more than a car, it requires special knowledge and training, and it's not really practical all the time -- but it does get you something that a car doesn't, and fairly ordinary people can be successful at it if they work hard.
A pet tiger is like having your own F16. It's insanely expensive, and in addition to a much higher level of special knowledge and training, it requires innate qualities that a lot of people don't have, and it tends to give your neighbors and the government the heebie geebies. Very definitely not a good choice for the ordinary person -- but there are a few people who could do it. It might kill them in the end, but to them, it's worth it.
As a final touch to the analogy, having the exotic cat but just keeping it in a cage all the time, never interacting with it hands-on, is a little like owning the plane but never having it out of the hangar -- it's a shameful waste, but it's where you'll end up if you get the cat before you learn how to "fly" it.