With all due respect, I don't think you have the faintest idea what you're talking about here.
Are thin people afraid of going to the doctor or to the hospital, in fear of the way medical trained professionals will treat them, with condescension, judgement, gaslight and disdain, every single time they would go consult? I don't think so.
Are thin people at risk of being misdiagnosed because of medical trained professionals taking only a quick glance at them, and coming to the conclusion that whatever ill they're feeling at the moment is linked to their fatness, no matter how illogical that sounds, and will thus ask of them to go on a diet most and foremost? I don't think so.
Have thin people been at huge health risks, or even died as a result of those misdiagnosis, because doctors told them to go lose some weight while they in fact were having extremely serious illnesses like cancers? I don't think so.
Are thin people afraid of going to a gynecologist in order to get a birth control pill prescription, because their doctors might make them feel extremely uncomfortable, and make it painfully known that they're disgusted you'd ask for it, because it implies that you, as a fat person, are sexually active and that someone do find you attractive enough to engage in sex with you? I don't think so.
Are thin people afraid of getting pregnant because they'll then have to suffer 9 months if terrible fat-shaming and overall belittling of their bodies and selves, as well as constantl guilt-tripping over the health of the baby they're carrying because of how fatphobic medical trained professionals can be with them? I don't think so.
Basically, you're trying to equate the plight of thin people forgetting to properly consult medical care in a regular way, like any normal well-adjusted person would, to the plight of fat people, willing to consult that same medical care, and taking the proper steps to do so, but being met with fatphobia at every turn, to the point that it then becomes a threat to their very own health and safety. This is also what fat people means, when we say "medical fatphobia kills".
So truly, honestly, this take ain't it, chief.