It seems like a statement in today's announcement...

> Personal results in Search include... Personal answers based on info in your Google Account, like “my flights” from Gmail

...makes some aggressively ambiguous wording in a previous announcement [0] apparent...

> Consumer Gmail content will not be used or scanned for any ads personalization after this change.

So I guess anyone who assumed that "Consumer Gmail content will not be used or scanned for any ads personalization" meant that your Gmail was not being scanned at all was mistaken, since today's setting implies that it was still being scanned for Search personalization?

[0] https://blog.google/products/gmail/g-suite-gains-traction-in...