It's not just in rural areas.
I live in suburban NYC, in a county of almost a million people, and as far as I have been able to find out, there's exactly one primary care doctor in our county who does LGBT care. All the other people I've tried don't know anything about it and aren't all that interested in learning. (One doctor I asked said, "we don't learn about it in medical school, so you can't expect anyone to know anything about it.") I have to go to NYC to get any sort of LGBT-aware or LGBT-specific care. I'm more fortunate than the woman in the news story, since I don't have to drive 170 miles for hormone prescriptions, but it's still a 2+ hour schlepp each way.
And it's not all that great in NYC, either. The care at the LGBT clinic in NYC that I used to go to has been getting worse: it's harder and harder to get appointments, there's a lot of turnover, so whoever you saw last time won't be working there the next time you come in. And you can't get hold of anyone there any more by phone or by patient portal. I was able to find an endocrinologist (in NYC) and have been seeing her every 6 months, and I finally got a recommendation for a PCP (also in NYC) from the surgeon's office where I'm getting my SRS (hopefully!) who looks like she might work out.
A large part of it IMHO is the way the medical profession has been turned into the medical industry, run by large corporations who have been buying up the hospitals and medical practices and who squeeze the providers (doctors, nurses, etc.) and the patients to maximize their profit, while the insurance companies' practices make it practically impossible for smaller medical practices (who can't afford large departments dedicated to fighting with the insurance companies) to survive. And since there's not much profit in providing medical care in small communities and rural areas, what practices and hospitals there are get closed. We see that even in the suburbs -- the smaller local hospitals in our area are getting bought up and then closed and patients directed to the larger, more distant and more impersonal (but not necessarily better run) medical centers.