I'm part of that alt scene, though not a Goth, but had loads of that type of girl.
Goth girls are no different from non-Goth girls in terms of personalities and services.
It's also a very accentuated scene - not all girls who look goth are goth.
Some -most/a lot - are just rebels, some middle class, some genuine, some with Mental Health/Drug/Alcohol issues.