Just to clarify the usage of the term "preferred" when applied in biochemistry and science:

Body organs do not prefer things out of feelings, emotions, or a sense of right or wrong. i.e. you bodyr does not say to itself "self, I prfer to metabolize sugar, because I think it is healthy and nutritionists will give me a high five for that!" The body does not enter into such self conversations. I hope we all agree on that.

The term "prefer" here is just a mattery of ease. Like "cancer prefers sugar as a source for food", "fire prefers oxygen", or like, for people, "lazy people prefer to leave things to the last minute".

Wa'il