You made a great point. Guys have sex with almost, but only almost, everything especially while intoxicated.
Case in point: Kelly Lenza's autist husband not only married her, but fucked her at least twice, and she has the unfortunate children to prove it. Ditto, Amy Haramadan. At least two guys have dumped enough seed into Tess Holliday to produce offspring, and one married her (albeit as a green card scam).
There's a soyboy who is apparently sticking it into the monstrous and vile Virgie Tovar while stone cold sober (which is a mystery for the ages, as she is no-shit the least attractive woman on the planet). Even the 1000-lb, sisters, the Slatons, have found guys willing to slip them the D.
And let's not forget Chantal, possibly the most foul and disgusting hambeast still on four trotters (until Lord Beetus inevitably takes the hind ones), who has had sex with at least three degenerates, including her cucked ex-boyfriend and current roommate James/Peetz, the stoic African immigrant she lived with for eight years, and, most recently, an Egyptian drug dealer who keeps a separate sex mattress on the floor just for porking fatgirls.
We do have the permavirgins Anna O'Brien/Glitterandlazers and Jude Valentin, and hideous enby thing Elizabeth "Eli" Blodgett, who can only get it on with other female enby things as hideous as herself. We've also got corn-fed, gravel-faced self-proclaimed Fat Bitch Corissa Enneking, who went lesbo after her husband trooned out. But a surprising number of the deathfats we discuss here have not only found men willing to fuck them, but even marry them.
So much for men having unrealistic beauty standards.
...I have a female friend who's very obese (BMI in the 40-50 range - so a "skinny bitch" according to FAs) ... One of her boyfriends ended the relationship bluntly by saying (paraphrasing) "you're addicted to sugar and keep slowly gaining weight because of that addiction and I don't want to waste my life watching it." ... she's completely unable to quit eating sugar and it's because of her I ended up looking into all these hopeless fat ladies in the hopes of finding workable a solution for my friend - thus far, I've found none that she's willing and able to implement.
She's an addict. Addicts pursue their addiction until they're done with it, and not one moment less.
A lot of addicts are fortunate enough to have an awakening, a moment when it fully crashes down on them just how much they've already lost to their addiction—and that they still have so much more to lose if they keep going. Or maybe it's just as simple as, "Fuck this shit; I can't do this any more. Something has to change." Those are the ones that manage to quit. Maybe not on their first try at cleaning up, but eventually it sticks.
But there are still a lot of addicts for whom there just seems to be no bottom floor; they just keep going down and down, with the consequences getting worse and worse, as everything they've lost to their addiction just keeps piling up. And yet, as painful as their existence becomes, they never have that awakening. They never have that deep, "Fuck this shit," moment that sets them on a stumbling quest to get better.
It's really hard to watch an addict you care about keep destroying themselves. But until they have that moment of awakening, actually want to change, and become willing to do whatever it takes to climb out of Hell, there is nothing you can do. At best, you can keep a bunch of resources on hand so the moment she admits she needs help, you know where to send her. Until then, there will be no "workable solutions" until she decides a solution is needed, and is willing to work it.
It's shitty, but unfortunately that's the sad reality of it.