Growing independence can sound ungrateful when freedom has to be negotiated aloud.

Asking for more room means saying that the present arrangement is no longer enough, and there is no way to say that which does not also sound like a review of the people providing it. The request is about growth; the words available make it sound like a complaint. Both people usually hear it wrong, and both are usually acting in good faith.

If you are the one asking, name what you are grateful for in the same conversation, not as a tactic but because it is true. If you are the one being asked, try hearing it as a sign that the raising worked.