Do you really believe 16 hours of use daily is not indicative of an addiction? It deserves a headline as it is is a controversial statement that aims to minimise criticism against social media platforms and thus needs to be challenged / debated in society. If social media addiction is not treated as a social problem, the people will not pressure the government to regulate it. That is why social media platforms are claiming that it is only (a personal) problem (of some individual) if some use it for 16 hours while others suggest that it has become a societal problem because its users are now addicts. Social problems needs political solutions to address, and in this case one of the suggested ways is government intervention (through regulations).
Sure, if you want to to be technical and pedantic about it, everything is only a "problem" until clearly diagnosed by an expert! (See Behavioural addictions: What are the signs of addiction? - https://my.clevelandclinic.org/health/diseases/6407-addictio... ).
