You might know the tech better, but do you know what people will buy? That management will take care of the tech well? That they've hired the right accountant

You might know the tech better, but do you know what people will buy? That management will take care of the tech well? That they've hired the right accountants and lawyers to deal with financial and legal issues? I don't think people as a whole should avoid buying individual stocks...but I think it's probably a good rule of thumb for people. Sort of "don't buy individual stocks unless you actually know what you're doing. And 50% of you that think you do are wrong."