The article is obviously charged and written by a fat retard, but there is semblance of a reasonable point behind it... Underweight has been a problem in the modelling industry for decades, and one of the biggest signs of underweight is an extremely visible rib cage. Some prominent organization banned size 0 models because of this truthfully unhealthy body image. My BMI is currently about 18.3 (just below the low end of the healthy range). My ribs aren't as visible as Bella Hadid's (the girl in the article's first image, I believe), but it still very often causes me physical discomfort. Lying in bed on my side or my stomach is painful, even the lightest jab in the side (say, when someone tries to tickle me [not that that happens often]) hurts quite a bit, and stretching usually stretches my skin against my ribs, causing discomfort. Often, even as I just sit, I am uncomfortably aware of how skinny I am, and I'm not even that skinny. I can only imagine how someone skinnier than me feels. So yes, this article is retarded, but it also contains a grain of sensible truth: an extremely visible rib cage is a sign of underweight, which is just as bad as overweight. The low end of the healthy BMI range is just as close to unhealth as the high end. As is the case with most things, it's best to be balanced. Unless you are super fit (in which case you can be much heavier due to high muscle mass), I think you should try to stay around the middle of the range.