I agree totally with your disagreement. I am not doing any fundraising, but we are negotiating a couple enterprise sales and I am handling all bug fixes/user support. I have hardly made any progress on planned features. It's just way too much dealing with people and constant email interruptions and trying to be innovative. I am also taking on the businessy stuff as well, while my gainfuly employeed co-founder is free to drop a couple hours a day on code. This is one of the strongest arguments for > 1 founder IMHO.