I have another possible explanation for that first question, and I am making the assumption that I'm not the only person that has had to work on not feeling this way:
Even though we really shouldn't feel this way, a lot of us developer sorts wrestle with the idea that we're the only ones ever really working, specifically in the pure development phase of a project.
Granted, I'm sure everybody feels that way at least once during a given venture. I've forced myself to stop thinking that way, but it seems a fairly human thing to think.
* Antichromatic (hit and subsequently blasted out of the sandbox earlier this week, effectively Ikaruga mechanic applied to a platformer)
* Inferno & Ballistic SE (same author, same general gameplay, different world mechanics)
* Saturday Morning RPG
I'd love to see an actual vs fighter, but currently lack the free time to even care about hacking one up :/