My Grandma would write her passwords down in a book but leave a couple of characters missing. That way we got the worst of both worlds. A thief had 90% of the information and she couldn’t remember them.

Yes, even some top security experts use a notebook as their secondary password manager.

It's because a thief is more likely to steal your ipad than your password notebook, if you're raided by the US government, you probably did something pretty bad (and know better than to use a book for those passwords) or didn't, and whatever minor stuff they find wasn't on the warrant. Or someone more motivated than the official government finds you and extracts your passwords through more physical means.