http://chester.id.au/2013/01/05/on-selling-to-consumers/
The point is that most of the money in the world is actually in the hands of businesses. They are using it to do whatever it is they are responsible for doing in the overall structure of production.
And most of the software they rely on is terrible. Or non-existent.
The reason, though, that everyone works on consumer applications it's easy to put yourself in the place of the customer (for a similar reason it seems that by law every dozenth web app firm is peddling some sort of issue tracker tool). Plus all our hero figures are consumer-facing.