Raphi, to be clear, you are saying that pleasure is not independently good because it really is only the experience of being in a comparatively lesser suffering state?
What does it mean when you say that my experience of pleasure, or perhaps my mood of happiness, is actually just a form of suffering, albeit a lesser kind of suffering? How is it that I am "mistaken" by what I feel? Do you think it is plausible that I can be sunbathing on a beach in the Caribbean, drinking a margarita and reading Shakespeare and believe that I am feeling independently positive pleasure, and yet be mistaken in my belief, and actually suffering in all these forms of experience?
That is the issue here: belief.
But there's also other issues. In the OP, you refer to suffering as an "unpleasant" experience. Notice how you use the term "pleasant" with the "un" as a prefix. You could have used the word "hurt" or "painful", but you chose "unpleasant". The use of "unpleasant" means that there must be a meaning of "pleasant", but since you are arguing that any pleasant feelings are actually lesser-unpleasant feelings, neither pleasant nor unpleasant have any meaningful definitions. If pleasant feelings are simply lesser-unpleasant feelings, what does it even mean to be unpleasant, since pleasant is deemed to be equivalent to a form of unpleasantness. It seems as though you have a conception of pleasure, and know what it feels like, but wish to get rid of it anyway.
In other words, it seems that you recognize that people commonly believe they have independently pleasurable experiences, but wish to eliminate them by reducing them to lesser-unpleasant experiences.
And you later used the analogy to temperature, however this is also problematic, because temperature is an objective feature of reality whereas the experience of heat is subjective. Just as someone may have a million dollars and feel poor, someone else may get their first job and feel rich.
There's another issue here, a phenomenological one. Compare the experience of avoidance and pursuit. We avoid suffering and pursue pleasure. We do not simply avoid suffering. When I find something to be pleasurable, I do not tell myself "this sure is better than the alternative!" I tell myself "I sure am glad I'm able to experience this, it feels good!"
Are you attempting to argue that what we see as independently good experiences only look good when in comparison to our current state? If so, then this also runs into problems when one considers going into a
worse state of experience. Consider: you have a splitting migraine, and suddenly get your arm broken. Clearly you went from a bad state to an even worse state. But then say you get your arm mended but you retain your migraine. You of course will call this a better state of experience, but surely you wouldn't forget about your migraine? Surely you would still have a migraine that is painful and hurts? Surely you wouldn't see the migraine as pleasurable?
Thus there seems to be a necessary threshold.
Perhaps, as you said earlier, the neurotransmitters act as a sort of "forget" function in the brain, so that we forget our needs. In the OP, you said that suffering is the phenomenal experience of needs. Therefore, if we forget our needs, we no longer suffer. Thus pleasurable experiences, far from simply being lesser-suffering experiences, are independently positive experiences that we feel when we do not have to worry about our needs. In fact this is similar to the Buddhist conception of bliss, which states that basically bliss is attainable when we stop striving. As soon as we simply
be, bliss comes naturally and automatically.
Then there's also the issue where I have options to cease consciousness. I could take sleeping pills and go to bed, but I choose not to, because I want to stay awake because I enjoy doing the things I'm doing. And it's not that I feel suffering when I go to bed. There is a positive reinforcement going on here.
The biggest issue by far, though, is that you have to explain where we got the idea of an independently-arising pleasurable experience and how we believe we have them while in reality not ever getting such.
I'm curious as to what your reply might be. It seems you have a tall order in front of you - you must be able to defend the claim that all experiences are a form of suffering, even if we don't consider them to be sufferings.