I ask this because when I was younger, I also had tastebuds warped by hyper-palatable foods, but after incrementally getting my diet to such a clean and optimized place, I literally feel bad even while chewing and tasting something like a donut, heavily salted and oiled potato chips, or candy. It's probably like how I would have felt if I literally mixed a tablespoon of oil and sugar or salt together and swallowed it.
Is it that hard to shift the system toward better habits by incremental introduction of better ones, and crowding out the bad? Exercise helps here, because once you begin to enjoy fitness, you get a stronger feedback loop with the bad food creating bad outcomes.
Also, not everybody enjoys fitness.
I don't like it. I still go 5 times per week and have been doing it consistently for the last 2.5 years
I'm muscular, a bit overweight.
With some people, I think they have just lost what being sated feels like.