Exactly. Enigma was cracked because the Germans applied routine practices that limited the available entropy instead of making the code harder to guess, as they

Exactly. Enigma was cracked because the Germans applied routine practices that limited the available entropy instead of making the code harder to guess, as they intended. It's important to avoid the classic xkcd "4, guaranteed random number" issue with overused passwords, but that doesn't necessarily mean that all equally simple (as in memorable) passwords are insecure.