Useful, but then there’s still the problem of remembering the passwords.
That is why you use different passwords at different levels of activity.
For instance, the perhaps 10 or so passwords you use online for important sites, should be unmemorable characters in an unusual number greater than say 17 characters. If they are “junk” sites that do not have personal or financial information on them, they don’t need greater security, so can be throwaway logins and passwords.
Importantly, you DO NOT store these passwords on your computer, or let your browser store them, either. Instead, you keep them in a vault, typically 2 thumb drives, both of which are protected by your “dice” password.
This means it is far more likely that your password will be compromised by the online site than by you. So every one of these 17 character passwords should be “dated for freshness”, and changed periodically, say once each six months.