True! Their impetuousness are expressed in different ways, and Aredhel was no doubt limited by what she could do in a patriarchal society...

I still don't get it, why she went with him to Gondolin.
That is a pickle.Maybe she was attached to Idril? Maybe she wanted to get away from dear old dad?

Unless it had something to do with love/hate for the sons of Fëanor?
Might be! Aredhel sure did have extremely conflicting feelings about them... Well, about Celegorm, at least.