I understand this sentiment completely and can see where people are coming from.
However, I do sell games and I get a sense of accomplishment when I actually finish a product. It's still a new feeling, despite having four books out that I've either had a hand in or wrote directly and another one that I wrote but didn't publish. When I sell the product, for me, what keeps it from become a chore is that I feel that I'm not selling books to make a bajillion dollars. My hope is to break even on the money I've invested into the project.
Critical! is going to be a challenge for me because I feel that I should support it more than I usually want to. Usually I'm done making the game, and I want to move onto the next project rather than sit back and stay with the same one. We'll see how this goes. I really want to have fun with this one.