I have skimmed some of the posts rather than reading straight through but read most of them.
I think part of what we are witnessing is evolution at work. What I mean is that we have evolved an ability to make food-like substances from real food sources that give us a refined but nutritionally deficient version of the foods we woud otherwise be consuming. That's been covered.
There are at least two possible outcomes to this situation. One is that the human species will select for bodies that withstand and become able to produce health with these 'foods'. The second is that the human species will select for bodies that are healthy, so those which have unfortunately self-selected for tricking the body into consuming 'foods' that cause illness will eventually be selcted out by those whose bodies remain healthy from consuming foods that contain the full spectrum of nutirents needed to maintian them in a state of health.
Taste, from an evolutionary perspective is
selection. If the human species selects tastes that are to its detriment, then the results will follow, and I think they have largely. Defining taste as preference doesn't take any step at all- it's still a selection, and clearly there are variances, testifying to its use as a selection tool for the species. As others have shared, it is linked with the intellect and insitinct, and in many ways the combination of these attributes will determine our well-being in the context of food and taste.
I think this is also linked very strongly to our relationship with the earth. As a species, our treatment of our bodies and food sources has had a major impact on everything, and is not separate, so in considering the evolutionary potential for our selections, we have to consider the earth's tolerance of those. So saying, part of the evolutionary potential of eating non-food or nutrient deficient food which are a direct result of how we cultivate, harvest manufacture, and produce our foods, comes directly from micro and macro organisms outside our scope of control.
The other options that complement the options I listed would involve those systems and organisms.
We play with fire. We don't do anything outside of evolution, if evolution is true. If we select to our detriment, then we will experience that detriment as a species, at some point or points. It does not even matter (evolutionarily speaking)
why we selected as we did, just
that we did. It matters presently to us as intellectual and instinctual beings because we have the ability to choose otherwise, but selections made already are made and the results are part of our evolution.
As an aside, being a former raw foodie, I also agree that raw foods overall seem to have given me loads of energy, but over time, I did feel weak and lsitless and so did the rest of my family, BUT I was not eating meat except rarely. I have since found that denaturing meat through marinades of acidic ingredients leaves them raw, but not chewy or at all hard to digest.
Learned preference is only of interest to a study of human socialisation and behaviour and not much to do with evolutionary biology at its fundaments. Learned preference is still selection.
We
made the processed foods that we now choose to consume (select). IMO, a progressive evolution would be one where the healthy select for real foods and don't continue the detriment of producing processed synthetic non-foods. I'm not making a judgment of anyone or wishing an end to anyone; from an evolutionary perspective, unless the human species selects for health (which doesn't come to us without proper nutrition), then we will be selecting for another species or set of species to take our place and do it right.
Neat discussion.

ETA: I think the reason why our bodies can be tricked is because before we started tricking them, they had no reason to select for bodies that can distinguish between real and fake food. That's the next stage and we can presently
intellectually choose the real food, but our bodies are only partially adept at doing this without our intellects, as our population shows rather obviously. An intellectual awareness of the symptoms of consuming fake foods seems to be the key to recognising the deficit from those foods. I feel terrible if I eat white bread or pasta, but I didn't know that until I was older and able to intellectually assess the physical symptoms that followed eating it.