it's all heat. if fire doesn't burn you, then hot gold doesn't either. good grief. either she's fireproof or she isn't. if it was a one-time thing, then fine, but if it wasn't then she's hot gold proof too.
there doesn't need to be speculation that targs aren't all fireproof, there's plenty of proof they aren't.
her being possibly fireproof had nothing to do with human resurrection. you and cns are really flipping your dicks around on that one.
i don't see why the red lady couldn't just puke fire into him like thoros did with beric. jon doesn't need to be fireproof for that. or a targ.