That stupid bitch has a lot of gall calling herself a Star Trek fan while simultaneously whining about the lack of deathfats depicted on the show. Either she completely missed or is deliberately ignoring one of the biggest running themes in the Star Trek universe.
From the very beginning Star Trek has sat on the utopian end of the sci-fi genre spectrum (at least as far as the Federation is concerned, and Earth in particular). Creator Gene Roddenberry's hopeful vision of the future had its roots in the optimistic futurism of the 1960s. His fictional universe was based on the premise that not only would humanity survive its darkest hour (including the Eugenics Wars, World War III, and the Post-Atomic Horror that followed WWIII's nuclear exchanges), but said darkest hour would make humanity finally realize the folly of warring with itself in the first place. He saw all of Earth finally uniting under one banner of planet-wide peace, and all the resources that used to be spent on war and death instead being spent on the people, on life.
By the TNG/DS9/Voyager era in the fictional 24th century, Roddenberry's universe encompassed a post-scarcity society. On Earth (and in the Federation at large), there is no hunger, no poverty, no pollution, no violence, no want, no fear. Everyone has free access to unlimited clean water, healthy food (including nutritionally enhanced versions of normally unhealthy foods created by replicators), safe and comfortable housing, clothing that always fits you perfectly, near instantaneous transportation methods, amazing health care, quality education, etc. No one has to work shitty jobs anymore to scrape together enough money to live, because money doesn't exist (again, within the Federation, other societies in Star Trek are different) and all your needs are provided for you. While employment isn't necessary, citizens are still encouraged to be active and do something with their time, but the focus of such activities is on self-actualization.
In this kind of society, how could deathfats ever exist? Every environmental factor people blame for weight gain is gone. All the free food you order from a replicator fits a healthy diet. So many of the life stressors that can cause people to gain weight have been eliminated. Everyone in the Federation has access to the same top-flight level of medical care and education. There's no huge corporations pushing self-destructive eating habits for profit. There's no stigma about getting treatment for mental health issues. If you need to get exercise, you can do it in complete privacy and in any environment you choose thanks to the holodeck, complete with a hot and 100% supportive personal trainer of your choice.
Not to mention the science of the fictional 24th century has cured everything from the common cold to the rarest of cancers. Curing obesity would be child's play by comparison--especially since obesity would be treated like the health problem it is and not the 'lifestyle' FA/HAES people proclaim it to be. After all, no one achieves self-actualization by becoming bedbound.
If that bitch wants to be mad that there would be no one like her--and no one would want to be like her--in a literal Paradise on Earth scenario, then that says a lot more about her than it does about Star Trek.