It’s hard to tell if you actually are making a coherent counter argument here since your response is 90% ad homenem.
Concepts are high level ideas. Mechanics are lower level implementations of those ideas.
But I think the original poster really meant “vision” or “motif” more than they meant “concept”.
A game with lots of deep mechanics but lacking overall vision is really just seen as a fancy tech demo by most people.
What exactly does this mean?
If you use an LLM to help with the code does that count? Or is this just about writing and art assets?
I’m also wondering if using AI to make concept art / placeholder text and then replacing it later counts?