Although I generally agree with your point, I've found that the difference between working on a project full time and working part time is a night and day shift

Although I generally agree with your point, I've found that the difference between working on a project full time and working part time is a night and day shift. There's a lot more pressure to make those sales if you define your full time job is making your business a success. I've done both, and found the full time option to be more likely to produce success for me. The other thing was that I got lucky on my first startup and have a bit of income coming in from that, which means the cost of failure is pretty small. As an econ major in college, I'm well aware of the opportunity cost of not working, though, which did weigh heavily on my decision.