Google is terrible for privacy. A while ago, I was not amuzed when I found out Chromium uploaded all my passwords to Google's servers. I then disabled it, but it never asked me if it's okay.
No kidding, I guess you learned your lesson 
I disabled option in my browser to save passwords and I think using external open source password manager is much better idea.
Problem is that many people use saving of passwords in browser with their mobile devices because it's more convenient.
I heard android phones are secretly reporting to google all the time what you are doing, if you are walking, seating, riding a bicycle, running, or standing...
They collect much more things and I don't understand why would they need to know that without asking a question about it.