

Actually, yes! What is “important” in a general sense is a similar question to that of the meaning of life. In the end there is no external, absolute rule of nature that decides this for us but we must create our own values. And privacy is such a value. In part you can derive it from others like personal freedom but that only moves the question. Different opinions on what our values should be and how to resolve conflicting ones in specific situations is the subject of ethics and has been debated since humans could debate.
If you have your (encrypted) password manager file backed up to one or more otherwise unencrypted media, then remembering your master password will be enough in a pinch. But yes, for day to day password handling you’d want to have a few more memorized, e.g. the ones you’ve mentioned. As those are passwords you enter daily, it’s usually not much of a problem, especially if you use memorization techniques.