This problem goes much deeper that “liking what is discussed” …
you must remember that the unconscious is HEAVILY focused on homeostasis (preserving the status quo). And this is about BOTH the individual (parent) and the family system (parents plus kids).
If the kid is recovering / healing / changing, it’s going to disrupt multiple unconscious parental strategies and many parents will rationalize some reason to pull the kid out of therapy to stop this from happening.
In short, the parent sabotages the kids growth / peace / freedom, so THEY don’t have to face uncomfortable changes.
It’s incredibly common, as well as horribly tragic …
Dewey Gaedcke’s answer to What are the benefits of seeking therapy?
https://www.quora.com/search?q=homeostasis%20preservation&author=84795924