You haven't been in their twittersphere much then. They love punk because its kweeeeeeer and antiestablishment which is great because they are sponsored by the establishment and grew up middle to upper class. FUCK YOU DAD!
Their shitty rainbow hair and outfit choices are basically a queer(fashion movement queer) take on punk. There's several who like goth, emo, & scene girls/boys and lump punk in there too. They like any excuse to riot and scream and prove to society that society owes them something, not the other way aroud, MOM. Punk is supposed to be rebelious and shocking and basically, a great way to throw a tantrum for them. They have to make punk have rules, however, can't be associated with degenerate fascist types. It's as lousy as it sounds.
I'm sure if you looked up trans punk songs and lyrics it would be a lot of whining and screaming for people to get comfortable with the girldick and boipussy because they love theirs and aren't going anywhere, so really lame punk.