I think the reason you see those kind of posts is that those kind of applications are low-hanging fruit. The development of Yet Another File-Sharing App or Social Media Service can be accomplished by anyone with a "Learn Rails In 21 Days" book and a credit card.
Companies that are also getting tons of funding right now are biotechnology and solar energy startups, but I have never seen anything along the lines of a "Ask HN: Review my research on getting 3.3% more current per solar flux unit by doping gallium with boron" post, despite the fact that such an accomplishment would likely garner extremely good investment and/or business prospects.
More to the point, people lack any domain experience.
Don't get me wrong: it's cool to be an awesome hacker... but if you don't know about anything outside of hacking.. chances are some neck-beard somewhere has already solved all of the problems of which you are aware.
> if you don't know about anything outside of hacking.. chances are some neck-beard somewhere has already solved all of the problems of which you are aware.
The other issue with domain knowledge, at least in my experience, is that it takes a significant effort to become sufficiently knowledgeable in a new domain to discover and solve the real problems faced by people working in that domain.
I think the reason you see those kind of posts is that those kind of applications are low-hanging fruit. The development of Yet Another File-Sharing App or Social Media Service can be accomplished by anyone with a "Learn Rails In 21 Days" book and a credit card.
Companies that are also getting tons of funding right now are biotechnology and solar energy startups, but I have never seen anything along the lines of a "Ask HN: Review my research on getting 3.3% more current per solar flux unit by doping gallium with boron" post, despite the fact that such an accomplishment would likely garner extremely good investment and/or business prospects.