If you are top of the drawing world, you cant really rule over another person as the skills and proffesion of the entire world spends alot more then drawing. It also clear to say that its irellevant since its not an online or real life contest someone portrayed nor do you need to prove yourself to anyone with your art, that would be insane.
Try the tutorials for 8 months, and if you fail, then you fail and try again.
Remember, they started aswell, and not everyone had the same amount of time to learn it.
Because they are humans. and humans arent build the exact same way in right and left brain, and their LEARNING ability in learning different skills is different. a talented artist is good at learning fast quickly through their brain but not good cooking food ,even though its creative aswell in some parts.
They still become chefs, because while they are talented, they arent interested in it,so they still become illustrators.