You need to factor user behaviour in, if most users don't change because of inertia then effectively there are no competitors.But Google doesn’t have the entire market to themselves. As the article points out, there’s bing, DuckDuckGo, yahoo, etc. and all of those can be used on your Apple products with a simple change.
And if your example was correct (which it’s not), that wouldn’t be capitalism, it would be the opposite; anti-capitalism. Capitalism is about free markets and competition (which there is with other search engines). What you described is not free market, and therefore not capitalism.