Something to consider when you save your passwords in Google, you can "forget" and reset your Google account password and all your passwords are still there. Compare that to a proper password manager where if you forget the master password (assuming sufficient complexity) nobody is getting those passwords back ever. So Google has full access to your passwords whenever it feels like it.

As the other commenter said, there's zero risk giving a dodgy site a randomly generated password used only for that site, the randomly generated password gives them no information or pathway to any other web site.