Marijuana isn’t addictive? Really?

NBC News: https://www.nbcnews.com/health/mental-health/new-drug-marijuana-addiction-shows-promise-small-study-finds-rcna88258?cid=sm_npd_nn_tw_ma&taid=64822554f01664000108a88d If cannabis isn’t addictive, why are drugs being developed to cure it?