Because it does indirect lighting real time?This can't be the reason everytime someone crticizes an aspect of Starfield, he is shut down because of the 10000 object thing. No, when the game is running this suboptimally it is not rendering thousands of objects on screen, it is running regular, plain scenes found in dozens of games.
What is Starfield exactly? What does it do so differently that elevates it above the mentioned examples and justify it's significantly higher cost?
Why can’t it be the reason? Scenes are not levels built in a 3D modelling program to be imported into an editor in which everything is stapled to the floor.
Levels in Starfield are made by putting objects together into a setting. Chairs, desk items, tables, many of these items are movable. It’s not about 10,000 objects in a single space but the many hundreds of objects placed around that to build up a scene that can be interacted with, moved, taken and destroyed.