> "ChatGPT says" is the enshittified LLM-era equivalent of LMGTFY [...] Recipients are left to figure out whether it's AI generated

How?

Your ellipsis leaves out the answer to your question. The paragraph is contrasting "ChatGPT says" which is annoying, but transparent (as LMGTFY), with "sloppypasta" which includes no such indicator.

Admittedly, the paragraph is somewhat confusingly written. Also probably written by an LLM.