That's because schizophrenia is a basket term, rather like muscular dystrophy (one of those unassailable true and honest physical maladies you mentioned before) wherein there are several varieties with often wildly different causes, but mostly similar symptomatic profile and treatment options.
Just so you know - The sort of person who responds with violent epithets when asked to help maintain the house they live in is either a teenager, or someone with mental issues. I'm sure you'd be perfectly content to lounge in your own filth until you die, but unfortunately, other people need to step over and around you, and social conscience demands a token effort is made to keep you from choking on your own obstinateness. This courtesy won't last forever, however, and the effort is token. Have you thought about what happens when you burn out everyone around you, and they decide to stop tolerating you? What will happen when you get your freedom, Andrew? Will you work? Who would want you? What are you good for? Can you perform the basic social necessities to make it through a day of work, doing as you're told?
Do me a solid, Andrew. Go to the nearest big city. Find some homeless people. Give them some food, and talk to them. You'll find you have a lot in common. Ideally, this experience will highlight your very probable future, enough that you admit you've got something wrong, just like those poor souls dying on the street. More likely, you'll just get some critically important exposure to a culture that will dominate most of your life. Either way, you need to do this.