I think Google's 'product' is their ability to demonstrate to advertisers Google's ability to manipulate users more effectively than their competitors can. To accomplish this, tracking is necessary. Any 'help' they provide you is purely incidental. If the data showed it was more effective to mislead users, they would be obliged to do that and ensure maximum value to shareholders. Look at the fake news controversy Facebook is dealing with. Fake news generated more page views and was more profitable, so that's what everyone pushed.
What I'd love to see is a service doing some or all of the tracking and data storage on the end user's device, with relevant data being matched and pushed to anonymous users algorithmically. Easier said than done I concede, but that's what I want. I'm happy to pay for such a useful service and I strongly prefer this to trading personal info.