I would be surprised if there is a journalist alive who could honestly say that they have unerringly adhered to the journalists' code of ethics. Deadlines, exclusives, on-going relationships all put pressure on ethical obligations. The source of conflict does not need to be external. We all have points of view. That is what makes writing interesting in the first place.
Point of view can all too easily become bias.
These are conflicts of interest that cannot be exposed by any declaration of personal interest. Point of view can all too easily become bias. There are two ways of dealing with the problems dealt with by the inquiry. One is to regulate. There are limits here.