You're misunderstanding either the parent comment or how entropy works. An organism is not a closed system, and thus isn't bound by any law of increasing entropy. In fact, life is practically _defined_ by maintaining local entropy (at the cost of the entropy of the systems it interacts with), as in Schrodinger's seminal work, "What is Life".

The parent comment's claim that "life is a war against entropy" is completely in line with this model.