I'm not sure where you're seeing mostly skinny trans women, but there are some of us out there who are less so. 🙂 I'm around 220, and that has actually been an advantage in some ways - I'm very curvy and big-breasted and my face is nicely soft - and hasn't really been a significant disadvantage. (My surgeon agreed that health and fitness level was more important than weight, too. I managed to lose maybe 15 lbs for surgery as a side effect of getting as fit as I could, and I had an excellent and quick recovery with good results, so weight was in fact not an issue.) I might prefer to be thinner, but I'm in very good health and mostly happy about the places the fat went, so...