Yes, if data can be used to potentially locate somebody, like a combination of zipcode, birthdate and first name, it is considered PII (Personally identifiable information) and those strict policies would apply.

I'm responding to a comment that said trusting Google == trusting ALL Google employees, which is not true. Trusting Google with your data is believing that having some convenience (a mail service like Gmail, an intelligent assistant, etc.) is worth the risks you are talking about: Google drastically changing their policy, or being bankrupt and acquired by less scrupulous owners, etc.

Let's not just act like anybody at Google can look at your data and play with it, or a disgruntled employee will suddenly click a button and release all users' data on pastebin...