There are a number of past threads here about ultraprocessed vs. processed vs. whole food carbs. Carbs can be quite different in their impact on the system - as some are devoid of nutrients, some are chockfull of chemicals or PUFAs, others are nutrient dense and offer healing/grounding (like sweet potatoes and fibrous fruit & veg).
At the same time, I don’t believe in the ‘clean food’ trend which seems to share some of the same privileged psychological tendencies as veganism. Besides, very little in this destructive industrial culture is clean & tidy - as written about so well by Lierre Keith in The Vegetarian Myth: Food, Justice, and Sustainability.
I care about where/how foods are sourced, whether they are real, and their nutrient density.
On the other hand, I also am a fan of cross-cultural community flex and living a little - should the special occasion arise, I’ll gratefully enjoy some New Mexican fry bread, some homemade chapati, or some likely GMO tortilla chips from one of the oldest Mexican restaurants in the U.S. - but I stay mindful of frequency and degree of indulgence.
For 2019, I’ve eaten said tortilla chips on 5 occasions, 2 times of overindulgence (indicated by a little headache the next morning) - and 3 times of more modest servings. And I’m glad I did, I think I’m better for it I’m not doing medical keto - so I find value & meaning in Realistic Keto as defined by me and my measurements and energy level. This, in a context of being often a 50g net carbs/day or less person.