People consider most factory processed vegan food as junk food because it is junk food. Junk food is food which is predictably conductive to harm. Most factory processed vegan foods are high in salt, fat, and sugar, low in fiber, phytonutrients, and naturally occurring vitamins, containing advanced glycation end products, oxidized and rancidifying fats, and even cancer causing polycyclic aromatic hydrocarbons and acrylates, endocrine disrupting bisplenols, and a vast assortment of food additives
I disagree. Regarding your assertion of processed vegan foods being high in salt, there is a little bit more than ideal, true, but honestly, sodium is an overblown concern in most peoples' diet. Also, I eat a lot of processed vegan foods and average only around 2000 or 2500 mg of sodium per day. Despite the USDA being around 2500, studies have shown that most of the real harm comes in when average 3500 or above. I'm middle aged and have perfect blood pressure. No, I'm not worried about sodium. Plus, salt tastes good.
Regarding fat, there is actually nothing whatsoever wrong with this macronutrient, except for trans fat and, in large quantities, saturated fat. Almost all of the fat in processed vegan foods is monounsaturated and polyunsaturated. Zero harm there.
Regarding your assertion of sugar, I'm really curious what processed vegan foods you believe are high in sugar? Certainly not faux meats, which typically have none at all.
Regarding the rest of your parade of horribles (not enough fiber, phytonutrients, naturally occurring vitamins, etc.), this is honestly a red herring. Eating faux meats doesn't stop anyone from getting all of that other stuff from the whole foods that one eats alongside the faux meats. Eating, for example, a faux burger on a bun with a side of refried beans and brown rice, you'd get plenty of fiber from the beans alone. Regarding phytonutrients, most vegans get toward the high end of this and, if anything, too much. I'm a vegetarian who eats vegan nearly all the time (exception is very occasional cheese in social situations). From a nutritional standpoint (as opposed to an ethical standpoint), my diet is effectively vegan. The amount of phytonutrients I get in soy milk and tempeh alone pushes me to the high end from health standpoint. Also, I wouldn't want any more fiber in my diet. I already average up around 40 grams per day. And, regarding vitamins, there is plenty in the whole foods that the average vegan eats alongside the faux meats.
No, I think your arguments against processed foods are not very well founded and, I suspect, are essentially a form of asceticism. Faux meats are a nice flavor and protein boost when consumed in a normal diet that also includes whole foods. Besides which, I find a plate full of green stuff--kale, broccoli, whatever--to be not really all that appetizing. I think this is rather common for humans, which is why only 3% of the population is vegetarian, and only 0.5% of the population is vegan, with a subset of that being whole plant food vegan. It's also why wpf vegan is such a tough sell, and why "processed" vegan food should be the type used to try to convince omnis to explore a less animal-based diet.