If you purchase someone's house you can smoosh or do whatever you want with it.

Did any object in the commercial belong to you? Are them even real?

I would have no issue if you smooshed a 3D rendering of my house

Were these objects stolen from somebody??

It produced a video that's fun to watch for some people (and an ad, which is valuable if you're Apple). Mythbusters wasn't wasteful either.

These aren't one-of-a-kind objects.