That's now how modern capitalism works. You can't open a corner store, because someone is already on the corner running a store. You can't open one on the empty lot down the street, because that guy running the corner store took his profits and invested in zoning laws to prevent it. If you could, there would be a store there already. Finding an open opportunity is like finding a gold nugget. It just doesn't happen very often, and definitely not in places where people have combed for them for decades.

The same applies with NVidia. You can't start a GPU company because they are the GPU Mafia. They'll run you out of business before you even get a foothold with patent suits, licensing fees, etc, etc, etc.

That's why you have startup taxi companies literally breaking laws everywhere they go. Because the laws were, in part or entirely, set up to protect established interests.

Softbank then, is working inside this system, from the standpoint of the Capitalist... the man with all the money. They're buying up corner stores, because in the long run, it is guaranteed to pay them back. Even if poorly run, it will pay off for years because of the lack of competition. Capitalism is set up to favor the owners of capital.