As far as I know, it’s not the number of processing steps that decides on the healthyness of the end product. We know that most processed meat products are really unhealthy thanks to potassium chloride and carcinogenic nitrosamines.

But pasta or bread aren’t worse than wheat as long as no additional ingredients are added. Tofu isn’t worse than soy. A ready to eat tomato sauce with herbs, garlic and olive oil isn’t necessarily worse than a sauce you prepare yourself.

However, industry food often contains lots of added sugar, saturated fats and questionable additives. But that’s more a correlation than a causality.