[inigyou]

Because they control what the machines do. In a world without power drills where you have the only knowledge of how to make a power drill, you own the construction industry. The drills don't own the construction industry.

[SoftTalker]

But why will the machines allow themselves to be controlled. They are "super intelligent" remember, in this imagined scenario.

[inigyou]

Intelligence is constrained by its substrate. We know how to assert the concept of subservience.