You would seem to have a valid point about the tendency for "pendulum swings" in diet trends (well, especially in fads), as well the additives that are seemingly much more common in processed foods made for the American market (I mean, if you simply look at the number of those additives that are specifically prohibited elsewhere, it can almost be alarming.)

However, when you say "boomers of the family ate fat and sugar like it was going out of style", 1) I'm assuming you meant "my family", and 2) the point of the link is that Boomers as a whole didn't eat a lot of sugar until fat was demonized by campaigns specifically intended to "downplay the risks of sugar and highlight the hazards of fat"†.

And I don't believe they consumed comparatively nearly as much sugar as their children. And let's not even get started on the topic of high fructose corn syrup (which is problematic for more reasons than potential negative health effects.) Seriously, if you look at just how many food products in a typical American supermarket have added sweeteners, it's can be staggering.

† https://www.npr.org/sections/thetwo-way/2016/09/13/493739074...