Request for Startups – "LLMs That Write Well" – Why?

Folks, I've been looking into LLMs creativity and writing style recently, expiriencing the common fructration there. The problem is obvious, but it doesn't seem to me that there is a merit for a startup/company. Solution seems to be a new loss / protocol in RLHF / RL posttraining. And it feels like that frontier model should be capacle of that (improving comms and style), without regressing on the core metrics. So, when any frontier and sem-frontier will care - this should be solved quite easily (by them, not saying this is a simple problem) - and destroy the moat for any startup. Curious, what people here think - why this is a theme in YC request for startups? What am I missing?