If you’re a fat runner for a long time, it means you have absolutely NO BRAINS AT ALL about how to eat.
The “writer” seems to have zero motivation to lose weight and wants to be accepted as a fat runner. But training for a sport should mean trying to achieve your ideal weight for that sport be it boxer, runner, jockey, or skateboarder. Of course people expect her to lose weight if she keeps up her running efforts. She needs to count calories and lose weight. She will be healthier at a lighter weight.