It is a bit better than you're saying. When you fire it up, you can see that it does have a list of common credential areas that it hides from the jail. It seems to hide:

    .aws  .azure  .bash_history .config  .docker  .git-credentials  .gnupg  .jai  .local  .mozilla  .netrc  .password-store  .ssh  .zsh_history

It's a humorous attempt in a sense, but better than nothing for sure!