You are right, Lego prices are one of the few, which didn’t go up as much as other popular toy brands, in fact for a few decades now they managed to be consistent with prices.

The audience is huge for SW and Lego amongst adults makes it possible to release these enormous multi-thousand piece sets, which pushes the prices up. More pieces = higher price.

Its a lots of money? Yes.

Is it more overpriced, than the average lego set price per piece in general? No.

Not playing the devils advocate, only as a fun fact:

The price of lego sets per piece (PPP) is pretty consistent over the years, almost since the 80s. Even the licenced sets are staying relatively close to the average PPP.

The big difference is, that all the Lego enthusiast kids from the 80s and 90s are now adults with disposable income and Lego is riding this wave since the mid 2000s by releasing bigger and bigger sets aiming mainly adults, who can in theory buy them.

Here is an insanely in-depth analysis about the prices if someone is interested:

https://therealityprose.wordpress.com/2013/01/17/what_happened_with_lego/