The goal for all of us is fat tissue health, not minimal fat tissue It's a long term proposition!
One of the reasons why Mark and other smart people stress "real food" and good exercise, etc, is that fixing your diet and these other environmental factors can repair (perhaps!) the damage done to this organ (the fat tissue), much like alcoholics can fix their livers (or at least stop damaging them) by laying off on the vodka.
To quote Gary Taubes quoting Bob Kaplan:
"There is nothing magical about restricting carbohydrates, rather it’s closer to the kind of diet that we’ve been eating and are presumably genetically adapted to eat, and any loss of weight and water, any beneficial effects on serum lipids are just a correction rather than an improvement in health.
Benefits v. Correction:
A restricted-carbohydrate diet doesn’t make you lose weight; it corrects your weight."
The Black Box: A New Way of Thinking About Fat Loss