Antonyms for "are in to one for" could include disinterest, dislike, aversion, and indifference. These words imply a lack of attraction or enthusiasm towards the subject, as opposed to being invested or involved in it. When someone is not "in to" something, they may find it dull, unappealing, or even distasteful. This can apply to a variety of contexts, such as hobbies, careers, or relationships. It's important to remember that just because someone is not "in to" something, it doesn't mean they are opposed to it or judgmental of those who enjoy it. These antonyms simply describe a different, less passionate perspective.