Where did you see the thing about quality? All I found was:

They also had to overcome the “zeitgeist around prefabrication in Canada” which assumes factory builds are poor quality, Chicoine said.

That’s no longer based in reality; some studies have argued prefab projects can catch potential defects during the design phase, yielding higher-quality builds.

That's not really the focus of the article at all.

I think prefab has the potential to ease the housing crisis here in Australia.