Comment by smsm42
Hidden where? Are you writing it on a post-it and putting it on top of your screen? Are you keeping it in your wallet? In a safe? What if you lose it or your house is flooded?
> And 5/21 might be the birthday of your first child, or your wedding day, or whatever?
How sure are you that you'd remember all that scheme for 20 years? How about 50 years? Some documents may be relevant for a very long time. What about if you need more than one key? What about if you need to give access to one document to specific set of persons?
Once you consider all the scenarios that can happen through a lifetime, you start to understand why managing all those complexities correctly is not trivial. And that's why people pay third parties to do it for them. It's not because encrypting a bag of bytes is hard. It's because of all the things that surround it.
A post it with master password on the fridge seems much safer to me than simple repeatedly used passwords. Computer can get hacket but the post it on the fridge is harder to hack.