while butyrate orchestrates the expression of genes responsible for halting the uncontrolled growth of cancer cells.

Cancer cells mutate at extremely high rates. That's why tumors come back after chemotherapy shrinks them. This approach, if it works (a bigger if than the article made it out to be), isn't going to be immune from that.

From the article: "The double attack triggers cellular suicide, also called apoptosis, in the cancer cells."

Sure, but many cancer cells have already mutated and lost some number of the many genes that cells use to undergo apoptosis. And those cells are the ones that kill a patient.