Value is a by-product of the selective process, which favors what survives over what does not. The evolutionary process has built us to experience "value." We have been molded, that is, to experience as having positive value what has served the survival of our ancestral kind, and thus tends to meet our needs and make us feel fulfilled. And what has been associated ancestrally with the death of our kind -- with injury, frustration, misery -- we experience as having negative value.
To say that there is no such thing as "value" makes as much sense as to say that there is no such thing as pain.
(You can find this idea more fully developed here. A related and still more substantial treatment of this issue can be found in this chapter, "What Makes Something Good", from an unpublished book of mine.)
(Note: You can view every article as one long page if you sign up as an Advocate Member, or higher).