This same type of advice as been serving people poorly for years.

The same foods (red meats, butter, salt) are always indicted, even though people ate these for hundreds of years and were not obese and suffering from heart disease like they are today.

But it's the sugar and the carbohydrates that are most responsible for all of these metabolic disorders, and anyone who cuts most carbs from their diet will usually get drastic improvements in their laboratory numbers even if they eat eggs, butter, meat, and plenty of salt every day.