If you didn't start healthy eating after decades of public health messaging about it, it's unlikely that you will start now and it'll make any relevant difference - and it isn't as if healthy people being better off isn't being constantly repeated. Vitamin D had it's hype phase, got looked at a bunch and it's still not clear how much it really does, although I'd agree that pushing the existing recommendations more probably wouldn't hurt.

> Doctors have widely been prevented

citation needed I guess. Again, lots of stuff is being looked at (and some integrated in treatment recommendations), not just "Pfizers own new drugs".