My mind has decided to continue to think about this topic despite my objections to the contrary so let me add something about how I perceive this definition of suffering and why that is my response to it.
Imagine if you will: There is a way to remove the ability to itch, through thinking alone. Now here's the caveat: it takes approximately a decade of reflection, meditation, and study such that you are essentially the Zen Master of the sensation of itching by the end of it.
This is sort of how I view this fixation on this one, fairly minor, type of suffering. It's itchy, it's not inherently mal-adaptive. That being said, there are no doubt people with eczema who could do with learning this technique of removing itchiness... but for the majority of people?
Imagine now there was a philosophy built around overcoming itchiness. Removing itchiness from your life in order to achieve contentment - yes this would help the above people with eczema - but wouldn't it also make people fixate on itchiness as the source of discontent? Wouldn't this make normal people's itchiness considerably worse?
I don't think removing that particular form of desire as a result are actually directly related to contentment at any point. I think the mind is just as capable of recognizing a future desire; realizing that it's experiencing something negative by doing so, and then just... stopping that at will. That's certainly what I do when I recognize myself doing it. I simply have to say to myself "Nah, stop fixating. We'll do X thing at X time and that's that. Nothing more needs thought about." for instance. I didn't need to destroy my ability to feel a thing to do that, that's just what healthy behaviour looks like.
Now, comparatively, about cognitive dissonance I will say that's usually by itself the sign of something deeper that you need to address. But removing the ability to feel it would be removing an important emotion that tells you that you're wrong about something.