Well, if he's that big, then his weaknesses'll probably be proportionally big too. [ She reasoned. ]

Besides, big opponents are way easier to deal with than small ones. [ She makes something of a smirk at this, as size difference plays a significant role in her fighting style. ] Their size makes them a lot slower than us. And we're so small compared to Galactus that he might not notice us at all. We'd be like flies to him-- smaller than flies!