You're right, tornado and total destruction was a poor analogy. A better one would be that the house is still standing, but the water damage from putting out a fire that threatened to consume the whole thing is relatively severe.
It wasn't a terrible house. Hell it was actually pretty great, and well built. But over time some problems have arose as your lifestyle changed and the house got older. You've been facing certain issues for years. Your HVAC system and appliances are aging inefficient money pits that smell kind of funny. The granny flat in the basement is only 500sqft for both your parents and your inlaws. The workshop you rely on for income has insufficient drainage / sump capacity and is on the edge of catastrophic flooding year after year.
Would you not fix those issues when you had the chance? Or would you stubbornly refuse to take the opportunity born of a situation and rebuild/fix things exactly the way they were?