Replace window with house, and you basically described a lot of the market?

There are also interesting efficiencies in there. Fixing a window is not as quick as just replacing it.

Not sure I understood your comment. How often do you pay people to break your house / phone / car, just so you can pay someone (else) to fix it?

I presume you just mean the farcical "break a perfectly working thing" idea. But, demolition is a thing. Similarly, turning a usable vehicle in for scrap is also a thing.