If you're saying actual human preference is determined by human biology and brain architecture, but mostly independent from brain content, this is a very new claim that I don't remember hearing ever before.
Hmm, I think I've said this many times already. Of course beliefs are bound to change preference to some extent, but shouldn't be allowed to do this too much. On reflection, you wouldn't want the decisions (to obtain certain beliefs) of your stupid human brain with all its biases that you already know not to endorse, to determine what should be done with the universe.
Only where such decisions manage to overcome this principle, will there be change, and I can't even think of a specific example of when that should happen. Generally, you can't trust yourself. The fact that you believe that X is better than Y is not in itself a reason to believe that X is better than Y, although you might believe that X is better than Y because it is (because of a valid reason for X being better than Y, which your belief in X being better than Y isn't).
So when beliefs do change your preference, it probably won't be in accordance with beliefs about preference.
On reflection, you wouldn't want the decisions (to obtain certain beliefs) of your stupid human brain with all its biases that you already know not to endorse, to determine what should be done with the universe.
As opposed our biology and brain architecture, which were designed by the blind idiot god.
Taken from some old comments of mine that never did get a satisfactory answer.
1) One of the justifications for CEV was that extrapolating from an American in the 21st century and from Archimedes of Syracuse should give similar results. This seems to assume that change in human values over time is mostly "progress" rather than drift. Do we have any evidence for that, except saying that our modern values are "good" according to themselves, so whatever historical process led to them must have been "progress"?
2) How can anyone sincerely want to build an AI that fulfills anything except their own current, personal volition? If Eliezer wants the the AI to look at humanity and infer its best wishes for the future, why can't he task it with looking at himself and inferring his best idea to fulfill humanity's wishes? Why must this particular thing be spelled out in a document like CEV and not left to the mysterious magic of "intelligence", and what other such things are there?