Caffeine is not addictive. Regular users of caffeine can develop tolerance and mild physical dependence, and sudden withdrawal can cause headaches and other symptoms (but only in half the population). This is does not qualify as addiction.
There is an opioid epidemic, with increasing overdose deaths from both prescription drugs and illegal drugs. Just how addictive are opioids? It appears they are safe when used appropriately, but there is a high risk of abuse, and they are deadly when misused, especially OxyContin.