Well you aren't wrong...but not exactly right either.
Diet blends are a different subject than "healthy food".
My diet, in order to be healthy for me, is nothing like my wife's diet.
I'm high carb, low fat, low protein.
My wife is high fat, high protein, and low carb.
I know others are high protein, low fat, and low carb.
It's all dependant upon genetics.
Some people can't even look at a dairy products without going into dietary distress...others have gluten issues.
Others can't do eggs.
Everyone is unique in dietary restriction requirements and balance.
But that doesn't mean that there is a diet that ever requires highly processed foods and refined sugars.
Hasn't happened yet.