You know it doesn't have to be all or nothing, right?
In the early design phase, for example, quick placeholder objects are invaluable for composing a scene. Say you want a dozen different effigies built from wood and straw -- you let the clanker churn them out. If you like them, an environment artist can replace them with bespoke models, as detailed and as optimized as the scene needs it. If you don't like them, you can just chuck them in the trash and you won't have wasted the work of an artist, who can work on artwork that will actually appear in the released product.
Larian haven't done anything to make me question their credibility in this matter.