Comment by account42

They could stop encouraging SEO.

They could start penalizing sites that show different things to googlebot and a real browser again.

The could do a better job penalizing sites that just copy content from other sites.

They could penalize ad-laden sites.

They could stop prioritizing youtube results over text content.

They could allow you to blacklist sites again.

They could do so many things.

None of this is curation, put priorization of search result is exactly what a search engine does.