Actually it is very important for humans to take responsibility of their thoughts or imaginations. Because what ever u feel or think is what u attract. dopamine would be a thing at a point. Depending on the situation but regardless people should constantly be self motivated. So they will attract only good things
It's "thoughts become things, if you see if your mind, you will hold it in your hand". So that's where our imagination enters, and maybe dopamine can really push our physical bodies to do what's impossible and so we achieved great things.
So in a sense, dopamine is really good to us as it will drive us to purse our dreams. Obviously, if we don't have it then we lack motivation, but there are a lot of practices that might help us have dopamine in our system.
Regardless, if we really have our dreams and then 100% focus on it, then everything is possible. And we should trick our minds and believed that it is achievable.