In an attempt not to teach any values, the value of facts also disappears leaving students with no incentive to learn - except perhaps the fear of bad grades. It seems like we must either embrace some standard of value (or angle of truth) in order to make the learning experience have any significance for the student.
If I am new to writing, it will be difficult for me to make a value statement about the quality of one author or another. On the other hand, I will quickly be able to discern my feelings toward that author. Perhaps the function of human-centered learning is not to dismiss either sort of observation, but rather to help the individual recognize where each one is valuable in the process of education.