"It could be possible. But I don't think it's very likely."

Because while she didn't want to rule out the possibility that whoever or whatever brought them here deliberately blocked the powers of the keyblade, that would be pretty difficult to manage.

"It's not like I can't use my keyblade at all. I just can't create a portal out of here. If something were blocking that, it would make more sense to make it impossible for us to use our keyblades at all."