To be honest, I think that the method described in TFA is overkill and unnecessarily limiting. I would instead recommend simply writing your passwords down manually and keeping them (unlabelled) in a safe place. That is, unless there are specific reasons not to do so such as you cannot trust your live-in partner or housemates, or your threat model honestly includes a targeted burglary to your home.
As long as you write down your passwords without the account name, without the title "Passwords", and ideally without even explicitly referencing what service they are the passwords for (as long as you don't need to keep track of too many of them), you are perfectly fine. And even of you do need to clarify which one is Google, which one is AWS, which one is banking, you can always come up with personal mnemonics that only you would understand how they relate to each account (e.g. "The one with the hug from Paul", "Green beans", "The one that tried to get away", etc.).
A burglar will almost certainly not even bother taking a bit of paper or notebook with random gibberish, and even if they do they won't have the slightest inclination to try to hack into your accounts (which accounts? they are not in the notebook!).
And if you're still worried about this hypothetical scenario, just agree with yourself to "salt" every password you write down by concatenating for instance 3 irrelevant random characters (or words, if using passphrases) on one end. If somebody breaking into your home, stealing your notebook, finding your Google account handle, and trying every single one of the j39yb1!L8q#4$1-like strings they found in it, and trying every version after removing the first/last n characters is a more realistic scenario than losing access to your digitally-stores passwords you live a much more exiciting life than most HN commenters.