In the long run it makes little difference how cleverly others are deceived; if we are not doing what we are best equipped to do, or doing well what we have undertaken as our personal contribution to the world's work, at least by way of an earnestly followed avocation, there will be a core of unhappiness in our lives which will be more and more difficult to ignore as the years pass.
This is the most elaborate and luxurious method of convincing others that you can cook. Take everybody out on your yacht until they're green in the face. Then you can rave for weeks about your sauce marinara and no one will gainsay you.