Let me be crystal clear: I'm talking about building up a side business in your spare time.
> If you are talking about starting a business on the side and working full time, that means you are sacrificing some combination of time with your family, exercise, and time that you could be putting in getting ahead at your current job or acquiring skills that would help you get a better paying job.
You think you somehow learn nothing attempting to build up a side project? I've yet to see an argument made successfully that you learn absolutely nothing marketable by working on a side project.
But let's say you manage to pull that off: all you've lost is a little bit of time. That's extremely low from a business perspective. Software is rather unique in that you don't need to spend tens of thousands of dollars setting up supply and manufacturing lines. And, the potential payoff is huge.
Now, maybe running a company isn't your thing. That's a fair argument. But fear of failure is a terrible way to go through life.
On a side note, why are you so relentlessly negative? Most of the comments you've made in this thread are needlessly hostile, sarcastic and bitter. Did a side project touch you inappropriately as a child?