Actually, I think you KNOW the answer to this. Why? Cuz this behavior is sending alarm signals to your rational mind. And you have begun changing your standards. This behavior is aberrant to your new core values. So it is setting up a contradiction. And that always brings stress.
I do not think any of us are 100% perfect. Nor do I think any of us can expect to look at food "as only fuel"--ever! LOL. Cuz it is so much more. Our gut which manufactures 90% of the seratonin in our body makes sure of that. Food is fuel, fun, pleasure, reward, punishment, security, celebration, drug. So. Much. Stuff.
I also think that morale seldom improves with beatings. You just have to accept a choice, catalog it, determine whether it helped or harmed, then decide what you want to do with the next best choice. Then you shrug and move on. But you don't in my honest opinion, tell yourself that your aberrant behavior is ok. It just "is". Right? No judgement attached. And it certainly isn't a treat. Is it a treat to harm your body with a big wad of insulin? Is it a treat to alarm your pancreas by suddenly loading it with highly available sugar influx that has to be neutralized quickly? Is it a treat to alarm your brain into a binge response? I don't think so. It sounds like you don't either.
But it still happens to all of us. It's human. What I do think we have to do is reframe behaviors with food. I don't know about you, but I ENJOY healthy deeply nutritious foods. It tastes great. I don't feel deprivation. So food is fuel but brings me great satisfaction now. And when I'm faced with the tortilla chips I will make lateral changes after making plans to incorporate the tortilla chips in my daily menu. I'll bring pork rinds in my purse and have 3-4 real tortilla chips, then 3-4 pork rinds with salsa, guac, or queso. No big huge cheat. Instead of a cookie, I might have a couple of squares of a Quest protein bar candy bar that I cut into 8 pieces and freeze for emergencies...or a 1/2c of Enlighten or Halo Top Ice Cream. And I don't feel guilty or tempted to carry on with the highly caloric foods.
Here's a good thread you might want to check out.