We also just wanted to try some modestly sized project with an LLM. Neither of us had any real experience doing any of the things we ended up doing for that project (other than my making the website and him understanding the graphics pipeline).
So, unfortunately, no, there was no specific reason I suspect.
https://stephencagle.dev/posts-output/2026-01-30-warhammer-4... is my best recollection of the thought process.