Dopamine, dopamine rush, etc are incredibly useful concepts that previously didn't exist in the English language. As you describe it's a useful mental model to explain your own and other's behavior, and as the person quoted in the article describes a so called dopamine rush is a palpable feeling.

The fact that the concept "dopamine" shares a name with a neurotransmitter is imho not that relevant and will over time just turn into an etymological curiosity. It would be better if it was named less confusingly, but that's not how language works.