If you think admitting you are not perfect would "rule you out" of a job it sounds like you haven't really interacted with real humans much (i.e. no sane person

If you think admitting you are not perfect would "rule you out" of a job it sounds like you haven't really interacted with real humans much (i.e. no sane person thinks that someone talking about something they struggle with when specifically asked is a disqualification). If an employer decides to not offer you a job based on your answer (assuming it isn't something along the lines of "I embezzle massively from every employer"), that is unlikely to be a place you really want to work anyways, in the long run.