Why the output has a house style
Anyone who has read enough generated prose can recognise it, and the reasons are mechanical rather than mysterious.
A model produces, at each point, something like the most probable continuation given everything before it. Aggregated over a whole piece, that pulls hard toward the centre of everything it has read. The result is prose with identifiable properties.
Balance. Every claim arrives with its counterweight. It is not just X, it is also Y. On the one hand, on the other. This reads as fairness and is frequently evasion, because the writer has not decided anything.
Summary sentences that restate what was just said. Openings that announce what the piece will do rather than doing it. Closings that reach for significance.
Tricolons, because three-part lists are pleasing and common. Elevated connectives. A certain smoothness where nothing is awkward and nothing is surprising.
And an aversion to the flat declarative. Generated prose hedges, because hedged statements are more often true across a large corpus.
None of these are errors. Each is a reasonable local choice. The problem is that they are the same reasonable local choices every time, which is what makes the aggregate recognisable.
And this is the mechanism behind the marketing observation from elsewhere in this catalogue: a model produces the typical version of the thing requested. In writing, typical is the one quality that has no value, because a reader chooses a writer for what only that writer would have said.

