[eherot]

You are correct that the access security of a booklet is almost certainly better than that of a password manager. The issue with the booklet is that humans do not like transcribing long strings between computer and paper so (at least in my experience) people who use the booklet method tend to eschew longer passwords, they tend to avoid creating new passwords when they can re-use an old one, and they don’t change the passwords very often (if at all). Also in the event that the booklet is ever lost or stolen (which is made significantly more likely by the fact that you must carry it around with you everywhere in this age of the pocket computer), you are suddenly in a very bad place.