There is an interesting nuance. GOOG's search is a cash cow.

An ordinary ("having a single motivation") person wants information about something.

Similarly, a search-engine having a single motivation to provide quality search results will seek to provide quality search results.

The GOOG of 2024 is a Dorothy gone very far from Kansas. It has many lucrative goals and Quality Search is not at the top of the list.

"Training an LLM on Reddit" is about as far from quality as one can derail without venturing into the outright dysfunctional nastiness of the worst corners of the Deranged Web.