Jokes aren't just half true, they're latent truths veiled by exaggeration. Jokes/ parodies are exemplifying irony about the thing being parodied in a way that by the way it exerts is somehow contrastive to a set establishment that professes some kind of dignified delivery.
In this case, it's showing the value of genetics and how it's a VASTLY supreme trait, and defies the dignified delivery of weight loss programs/ diet programs that are essentially attesting to you being able to win through EFFORT when in reality the utility of that is rather futile in the face of something far more different. Opening up the brutal reality of genetics. But this can only be disseminated through the sarcasm/ parody. Not through directness.
Liberal/ MSM doesn't want people to be open about truth because then you'll be a party pooper and giving faux pas of the distribution of information that true machiavellians that people respect have.
Essentially liberalism proves we are all machiavellian, and our current climate of what can be said needs to be restricted to ironies in jokes and embedded within humor. If we all were outspoken about what humor really disseminates then you wouldn't be able to have liberalist humanitarian views be credible in the face of how we discern. Jewmanitarianism is making us all hypocrites though.
It's like the joker from the dark knight and how our sense of humor proves our innate devilishness to our primality.
“I could show fight on natural selection having done and doing more for the progress of civilization than you seem inclined to admit. Remember what risk the nations of Europe ran, not so many centuries ago of being overwhelmed by the Turks, and how ridiculous such an idea now is! The more civilised so-called Caucasian races have beaten the Turkish hollow in the struggle for existence. Looking to the world at no very distant date, what an endless number of the lower races will have been eliminated by the higher civilized races throughout the world.”
― Charles Darwin
"A prevention of the faculty and opportunity to procreate on the part of the physically degenerate and mentally sick, over the period of only six hundred years, would not only free humanity from an immeasurable misfortune, but would lead to a recovery which today seems scarcely conceivable."
― Adolf Hitler
"The way of nature has always been to slay the hindmost, and there is still no other way, unless we can prevent those who would become the hindmost being born. It is in the sterilization of failures, and not in the selection of successes for breeding, that the possibility of an improvement of the human stock lies."
― H. G. Wells
"It is better for all the world, if instead of waiting to execute degenerate offspring for crime, or to let them starve for their imbecility, society can prevent those who are manifestly unfit from continuing their kind....Three generations of imbeciles are enough."
― U.S. Supreme Court Justice Oliver Wendell Holmes Jr., Buck v. Bell, 1927