I don't get it. Why would the lifespan of a company matter to the health of a portfolio? A portfolio is a dynamic thing you actively manage (well, you outsource it), and survives despite companies collapsing or people dying. Indeed, it thrives on
companies collapsing and people dying in the general case.
As for competence, it's not a requirement in any field of life as such. Successful faking is the key, and Offenhouse seemed competent enough in that