A home inspection can't tell what materials were used inside the floors and the walls, and how the pipes were installed. Particularly in a modern apartment block. And for new constructions you often buy ahead of completion.

In the UK for instance, health safety regulation mandates that all doors shut automatically in an apartment block. As a result doors spend their time slamming in modern flats. You'd better have good sound insulation. How can you check that unless you pay someone to make noise in every flat around yours to test it?