"Is there an expectation that questions posted should be factual?"
Sort of. From What types of questions should I avoid asking:
You should only ask practical, answerable questions based on actual problems that you face.
Generally, that's interpreted broadly. Users don't need to have actually encountered a situation yet (for example, I can ask a breastfeeding before giving birth in order to plan ahead), and have also asked on behalf of others (for example, asking on behalf of a friend or relative). Sometimes users change details to obfuscate their identity, or leave out things they aren't comfortable sharing, or even to make themselves look better.
Just because a question is hypothetical doesn't mean it is automatically a problem.
"most of the questions are still active"
Parenting (and all StackExchange sites) aren't just about helping the OP; they function as an archive of questions, thereby providing fast answers to other people who have a similar question. Interestingly, How To Ask could be read to imply that a hypothetical question (if asked well) is useful for the community.
Make it clear how your question is relevant to more people than just you, and more of us will be interested in your question and willing to look into it.
So removing questions depends (to some extent) on whether is there potential value to somebody else in the questions. At some point a divorced mom who wants to change to a different discipline style from corporal punishment may visit the site, read the imaginary question, and potentially find a useful answer. The OP lying about their own situation doesn't affect the content of the answers.
All that being said, a question still needs to be asked well to have value and members of Parenting.SE should treat other users with respect. Not only does this include a reasonable background description, but it also needs the OP to be engaged in the process: answering clarifying questions raised in comments, providing feedback to answers, and accepting the best one. Repeated failure to properly engage in the process is a bigger deal in my opinion than whether their question topics are fully based in reality, because it's devaluing the thoughtful answers being provided.
"the user has not been removed"
Account deletion is generally reserved for spammers or extremely abusive users. For less serious rule infractions, deletion is a last resort. I'm not going to get into the details of this case unless the user in question wants to discuss it.