For EXACTLY the same reasons a lot of guys are into fat women, or short women, or blonde women, or Asian women, or petite women, or women who look like Kim Kardashian. There are all types of people in the world and all sorts of things those people find attractive.
Nowadays, a LOT more women have tattoos than in the past. A LOT more women go to the gym than in the past. Some of these women are going to be attractive to men out there. Ain't no thang.