I'm saying there is a thing as too much world building. For example, you will want the immediate area the PCs are going to be in given some significant detail, but you don't have to fill in beyond that area except for light detail until it becomes relevant. (The old empire to the North, the haunted swamplands to the West, etc).
Some people think they need all the answers ahead of time for everything the PCs could potentially do. Firstly, that's impossible and secondly, it's a waste of time to stock dungeons the PCs aren't going to explore or detail the politics of empires they are never going to interact with.
Now, if you enjoy that, more power to you. But not everyone likes world-building for purely its own sake, and in a world where time is prioritized, id rather build as needed rather than have hundreds of hours of work spent on things that will never get used.
And there are levels of world building between "detail everything" and "use a published setting".