The problem is that while what you say is true over a long period, it's not true in the time period necessary to make progress work.

This is especially biting when you go out to raise money - there is a limited pool of money out there that is looking to be allocated. Sure, some small changes open up small amounts - such as the introduction of crowdfunding - but generally speaking there are more companies seeking funds than there are funds seeking investment.

Said another way the pie grows too slowly to consider the market anything other than zero-sum over the window of time that a venture has.