Your examples are a great way of starting all those things as well. Want a law? Write it, vote on it, boom. Law. Want a souffle? Mix ingredients, add heat. I've done souffles before, that's really all they are. Want to start making a car? Draw picture, order off-the-shelf components, assemble. (Watch OCC, this is how they make their famous choppers). Want to fix a tumor? Gotta know where it is and gotta open the skull. Cutting it out sounds like a great next step.
The part where a lot of people get tripped up on starting a business is that they instead start a hobby. It's not a business if people aren't paying for it. Yes even if you have thousands of users or app downloads.
Rather than spending your waking lives researching every aspect of starting a business, the fastest way forward is to simply try to sell something. Maybe you build it first, maybe you buy it, maybe you try to sell it, then build it. Whatever. But just try to sell it and you're in business. Then figure out all that other stuff.
Obama did "just" become president. He needed smoke breaks and his blackberry to do it all, but he did "just" do it. He subjected himself to his cause and reaped the benefits.
If I look at those three-step plans and feel offended, thats a problem with me. If I feel like I cant "just" say that succesful people are "just" successful, that speaks to a problem with my idea of what is "just", not what it actually is.
How to make a souffle: Mix ingredients. Pour in Pan. Put in Oven.
How to make a car: Design Engine. Assemble Parts. Paint.
How to remove a brain tumor: Take MRI. Open Cranium. Cut Out Tumor.