You're absolutely right. This recent trend of calling everything addictive and normalizing this misuse is not only stupid but also dangerous to society at large. Addiction is a serious thing with a well defined meaning. By applying it to things that are just rewarding, as opposed to things that hijack the reward system via direct manipulation to skew responses to predicted reward, it creates a perception of danger.
This perception of danger then allows for the conversation about real issues that need solutions (usually education) to bottom out and begin calls for the use of government violence to prevent people from doing what they want. Encouraging the use of force against people who haven't done any violence or fraud themselves is a very bad thing.
The circumstances have to justify it. Misuse of the word addiction helps that false justification.