Preparing your paper for publication can be exhausting. Who said that it is fun? Someone who never had to do it, probably. Many of us need to deal with this due to the academic regulations - you cannot proceed with your thesis if you don't have a published paper or several papers in peer-reviewed journals or full-range scientific magazines.
You feel inspired by science, and envision your entire life connected to it. When you think of a future career, you know that it will have something to do with science. But passion is not the only thing that drives careers forward. Smart people choose lucrative careers. They will still love their jobs, but they will also make more than enough money to support a comfortable lifestyle.