It's like YouTube-style engagement maximization. Make it more punchy, more rapid, more impactful, more dramatic - regardless of how the outcome as a whole ends up looking.
I wonder if this writing style is only relevant to ChatGPT on default settings, because that's the model that I've heard people accuse the most of doing this. Do other models have different repetitive patterns?
(An explanation for the emoji spam in GitHub READMEs is also welcome. Who did that before LLMs?)