Because a big part of goth other than the music is self expression and counterculture. Remember that some of your more masculine traits aren't always exclusive to trans women. Free will is a beautiful thing. Women are adult human females. Are gender neutral restrooms oppressive too?! Wear clothes that fit.
If you recently came out as a girl, you may be wondering how to express yourself and make your true gender clear to the world.
Do they seriously have nothing better to think about? Goth isn't a trend, it's been around since the 70s, but emo was a trend. Choose a swimsuit you feel comfortable in. Or it is something different? The not getting offended thing was good for questioning the trans-narrative -- I thought I had to get offended if I was really transgender. But if it were longer, you could get away with wearing tights or long socks, keeping in mind that gothic Lolita is very reserved.