At the same time, I wouldn't necessarily say that people are currently fine getting dopamine hits from social media. Coping would probably be a better description. There are a lot of social and societal problems that have been growing at a rapid rate since Facebook and Twitter began tapping into the reward centers of the brain.
From a purely anecdotal perspective, I find my mood significantly affected by how productive and impactful I am with how I spend my time. I'm much happier when I'm making progress on something, whether it's work or otherwise.