Dreaming and building are separate powers, and the second is far less fun than the first.
The first happens in a rush, usually late, somewhere between excitement and a third coffee. The second happens on a Wednesday afternoon, in twenty-minute pieces, on a section of the work nobody will ever look at directly.
Almost everyone has the first power. The rare thing is a tolerance for the boring middle, where the vision stops being interesting and becomes a checklist.
If you have ever finished anything, you have that tolerance. It is rarer than you think.