[QSIITurbo]

The medical scientists / professors I know have gone through several revolutions in medical science (statins, diabetes treatments, resuscitation procedures, surgical procedures, dialysis, etc.). I wouldn't call them unable to change their habits. In fact, they are few of the smartest people I know.

I don't know about the margins of food, but I consider preparing food from the basic ingredients somewhat time-wasting and costly (when I actually order or buy and prepare them myself). As they can have fine nutritional values, I don't think processed foods can be generalized to be bad per se.