TL;DR: the events are necessary, but instictively no one’s fault. So the curse/bad luck has nothing to do with it, it was just fate.

Was Goth trying to support Vriska by saying that her Bad Luck isn’t the cause, so she shouldn’t blame herself?

is this why Vriska would rather meddle, because she thinks that some people look down on her for how she acts?

Sweetie, I don’t look down on you for acting excited and hyper; I look down on you for feeding trolls to a spider