You shouldn't be blaming bad investors. They pay for their decisions with their, or more often somebody's else, money.
Blame the collective ownership of means of production, which in form of public companies have dominated the Western world for the last 30+ years.
When people think of of selling their business, which is their life's work, as a raison d'etre, something is really messed up with the business culture in that person's coutnry.