I read her opinion piece in its entirety, and while I have always believed Mayim to be a genuine person, I think that (among other things) the timing of this article is ill-conceived.
Imagine someone has a heart attack. When they wake up in their hospital bed after a triple bypass surgery, their friend is sitting there next to the bed with a bouquet of flowers and says "I don't have any heart problems because I exercise every day and only eat healthy food. There is a terrible culture of eating junk food, but I don't have that issue because I'm proud to eat healthy".
There are two problems with this: 1. even people that eat healthy can have heart problems (even if it's less likely), and 2. it's, in a roundabout way shaming and admonishing the heart attack victim.
If the friend were wise, he or she would wait several months and then convey their opinion. It will be received in a better manner and may actually be appreciated.