If you can listen to his talk and tell us what part of what he said is wrong then I think you will have a point. Anyone can talk about anything and certainly he can talk about what he and his organizations are working on and what they plan to do about various public health issues.
Please don't misunderstand me, I don't believe he said anything wrong. Nor do I think he doesn't have the right to have a say or to have an opinion on the matter.
My point is more along the fact that he is predominantly a business man who has done a lot of good around the world with his philanthropic foundations. He is a well informed individual with deep pockets and political connections, who is well placed to enact change in what ever forum he would decide to use those resources in.
He is neither an elected representitive nor someone who has to answer for his opinions or actions to any authority within a regulated professional occupation (doctor, professor, publishing researcher etc).
The way that U.S society works, and the level of trust and respect that the general population places on the 'famous' and 'rich' just doesn't resonate with the reality of life where I am.
That is why he, or his like, would never be turned to as authority figures on this matter in my country of residence as they aren't looked at as experts on these matters nor trusted to not have an alterior motive (however small).