Cytoxic treatment is NOT pointless, especially after embolization treatment. It prolongs life. See article by Moertel et. al. The management of patients with advanced carcinoid tumors and islet cell carcinomas.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Retrieve&list_uids=8291824&dopt=Abstract