In case of lmgtfy the receiver was usually the lazy person. The question was usually so simple that simple that asking it for nth time on public forum was the waste of everyone's time. In case of pasting LLM response verbatim the responder is usually the one wasting everyone's time.

LLMs are ascendant partially because they do not "RTFM", "read the FAQ", or "question closed as duplicate" at you regardless of how many times they've heard a question before.