The ideal state in capitalism is for businesses to be interchangable and suffer perfect competition in order to maximise the consumer surplus. This is different from the ideal state for capitalists, who obviously want a monopoly.
We're not in the startup world out of an ideological obsession with the perfectly spherical cows of economic fantasy. We're here to make money (among other things). We are trying to build high-growth sustainable business models. That means high profits, much higher than can be achieved in highly competitive industries.
Perhaps we shouldn't be saying "monopoly" so much as high demand, low competition, high barrier to entry.