That's just strawman. I have my pwd database stored in the cloud and synced to all my devices. How do I get back online? I will use one of my other devices. And in an unlikely event that all of those devices get destroyed all at once I will just hit "Forgot password" button.
Password managers make it so that you are utterly dependent on your password manager or you cannot login to anything. How do you get back online to discuss something if your computer burns in a fire, for example? Backups can alleviate this, but the paper is also a backup. Maybe do the triplicate thing?
I've considered using a password manager but there are too many times where I need to login to something from a machine that isn't mine, on a machine that I don't trust with storing secrets, or other circumstance. I simply don't want to be caught with my pants down and unable to login to something because my password manager isn't installed.