What does this quote stand for? [closed]

Can somebody explain me please what does this quote by Countess Morphy mean?

Plain cooking cannot be entrusted to plain cooks.

Let me serve up an analogy. It takes a talented and experienced actor to best play the role of an idiot. Of course, it takes a degree of ability to cook, too, but, I think that it's the paradoxical element here. That, when it comes right down to it, very few of us can appear normal, "mad", or whatever.

QUOTATIONS

If cooking becomes an art form rather than a means of providing a reasonable diet, then something is clearly wrong [Tom Jaine, Editor of The Good Food Guide]

Cooking is like love. It should be entered into with abandon or not at all [Harriet Van Horne]

Life is too short to stuff a mushroom [Shirley Conran – Superwoman]

The tragedy of English cooking is that ‘plain’ cooking cannot be entrusted to ‘plain’ cooks
[Countess Morphy – English Recipes]