Then it's semantics, if that's true, and dopamine may as well be "pleasure". For what it's worth the expert's explanation of how cocaine "compels" you to do work didn't sound intuitive. The common understanding is that it alleviates your brain's need for "pleasure" so you can focus on long term goals instead of short term goals (distractions). It's intuitive because it's analogous to satisfying one's pressing immediate needs so that one can do other higher level stuff.