You can get addicted to anything that gives you little dopamine hits and stimulating reward centers the same way gambling, etc does. Dark patterns are well documented. Medical science and multiple studies involving brain scans during social media use and lighting up those areas of the brain back this up. The DSM hasn't been redefined but there's recognition of it as a problem and Internet/Gaming (digital media) addictions being added to the DSM is being discussed and there's no argument these platforms are designed by psychologists to use our own brain chemistry against us and create these addictive behaviors. How this is done is well documented and its exactly what the law lays out in it's defining of what constitutes an addictive feed.

Source: Just search HN, there's been so many posts related to this.