That's the lie that people tell themselves... that Apple created this market on the iPhone. The created the app-store not the market for mobile apps. There has always been a market for apps on mobile devices back to Windows Mobile CE. Even Symbian phones could load apps. Apple also did not invent the concept of a software store. Windows had said app-store as well...
What Apple did was making the(ir) store the only entry point to the plattform.
In a hypothetical scenario where Apple doesn't exist, we would have an all-android world (very hypothetical -and scary) and we could at least sideload apps on all the devices VS only 50% with Apple (percentage depending on market), meaning Apple cuts off 50% from the mobile phone app market from the principles of the
free market.