Earlier quoted context omitted.
I am not sure if you are serious? It really has nothing to do with being grammatically correct. The article is chock-full of all of the most common LLM tells. The aggressive use of negative parallelism, filler adjectives like "deeply", and unvaryingly breathless tone all feel like decisions an actual thinking person would not make.
On the one hand, people say that AI models (LLMs, image generators, etc) are just stealing from people and that they cannot be original. On the other hand, people say that AI models have tells that no actual person would do. Which is it? You can't have it both ways.
It looks like it was the prevailing accepted style by the human team who was initially training the "AI"s. Who were not writing.