Essentially, what you're saying is that when a task seems insurmountable, you should simply pack up and go home. What a defeatist attitude. If everyone had your attitude, there would be no airplane, no space program, no computers...in all likelihood, humankind would never have progressed past hunting and gathering.
Is it not more a matter of being realistic? Of not fighting against the windmills?
Everything at the right time, in the right circumstances. When Robert closed the source and started working on SkyOS 5, it was already 2004. That means that Windows, Linux, OS X were all already very advanced. Thus you don't go on a one man crusade, telling the world that you are going to overtake Microsoft Windows all on your own, and asking your fans to pay 30 Euro if they want to help testing your betas. There are many hobby OSes which have done things right: Haiku, Syllable, ReactOS... no big promises and no money asked from their beta testers.
Now back to insurmountable tasks: when Linus created Linux he didn't expect it would one day become something that big. That was due to the right circumstances and to thousand of developers joining the project.
Steve Jobs and Bill Gates created almost single handed Microsoft and Apple. But again, right time and right circumstances.
You say that DasFox's attitude is the wrong one. With that kind of attitude we wouldn't have any of the modern comforts.
Now we know that neutrinos can probably go faster than light. But in order to achieve that result they needed thousands of people and billions Euro.
Or would you try to build on your own a spaceship like the ones we see in Star Trek?