Firstly. This model consists of different modules and foors, simulating a corner of an asian city. It's not 'one' building per se. But that's just semantics.
Secondly, people rightfully pointed out that this is a big, exclusive set aimed at adult fans. It's a showpiece for Lego, a collector's tem. Just like the UCS series is for Star Wars (those are actually made to be displayed in stead of played with). People also called you out on the word 'basic', which you use the most stupid excuse for at the moment. This is by no means basic. This is a 4800 piece set, with tons and tons of little details, play feautures, unique building techniques, etc. Basic is four walls and a roof.
Lastly, whatever you say you ment by it know, people read your post as confirmation of the 'Lego is way to expensive, it's become absurd' rethoric some adult fans of Lego have been arguing against. And people argued that your train of thought is incredibly flawed, as this set not only gives you a lot of bang for your buck, but isn't even a good example of the 'median' Lego set. And yes, in a Lego store you'll see a lot of expensive sets, as they are the main distributers of the big aimed-at-adult sets like UCS Star Wars, Direct-to-customers collector's sets, Cretaor Expert sets etc. People have called you out that Lego has a lot of choice of cheaper sets. They are still 'expensive', but the quality is there too.
So, you've been called out. There is no need to dig yourself in a deeper hole. You can also just accept you might've been wrong...