This is why Google is pushing SEOs to get their clients to codify and publish their domain expertise: while it gives them a way to filter signal from noise/slop right now (supposedly helping to "improve search experiences"), it also simultaneously extracts that experience into a consumable form for later training.

They really do want to know the ins-and-outs of the HVAC service business, for example, because they hope their agents will be handling it in a few years.