Im not an expert but people argue that bread and esentially most products whose base is just flour aren’t good. The reasoning is that those are carbohydrates that just add calories and nothing else (protein, vitamins etc…). So eating 200kcal of tuna is healthier than 200kcal of bread since those calories come with Proteins, phosphorus, omega 3 a bunch of vitamins etc. Whereas bread/tortillas are (basically) just carbohydrates which arent bad by themselves, but also arent good in excess
Or old school Windows 95 logo with a bit more effort