The question could of course take much further: Who or what is an expert? Applies in the television world as the expert who gives the impression that he could account for highly complex issues in a maximum 1:30. From this definition, everyone benefits: the transmitter (quota), viewers (good feeling), the interviewee (money and / or very good feeling). Only the thing itself is not there because they illuminate in time even more than half of one half part of the whole. So that makes knowledge transfer an absolute maximum of 10%.
Now it is in marketing but also not to interstellar quantum physics. Quite the opposite, because the marketing is about something in space are not definitely: hot air. And that’s a good thing, because what does hot air? It drives turbines. And that’s what makes marketing. From this standpoint, but also marketing something to do with physics, but only on a very basic level.
Just as there are people who thrilled by the sight of a rotating wind turbine, there are others who keep it in the wind, and some, the blow, and still others calculate the rotation and believe only when they have a formula that it rotates.
These are all experts. You need to decide is what is right for you.