If this were to become widely used, I can imagine executives writing financial statements, running them through an LLM, and tweaking it until they get the highest predicted future outcome. This would make the measure almost immediately useless.
LLMs could help a person learn to understand financial statements better, that is it.
There are not all these hidden gems in financial statements though that are being currently missed that language models are going to unearth.
Financial statements are already intentionally vague and often intentionally misleading.
Corporate CEO/PR/Marketing are already the masters of writing many words while saying absolutely nothing.