I didn't know there was a previous discussion on contests about making character sheets. The discussion there goes back and forth between the merits and demerits of allowing such exceptions to the normal rules, as long as they are tagged "just for fun."
The top rated answer discusses rules to follow when starting this. It also discusses how much confusion the tag created between users.
The second top rated answer says that it doesn't seem to be a good fit in general for the Stack. It adds no value other than what you would get in a forum.
I asked a similar question about a situation in 5e where you must use stats to arrive at the correct answer. While it didn't quite rack up as much attention or answers as I'd hoped, it does fall into the category of "just for fun."
Do these styles of question provide benefits for the site, in such a way that it is still differentiated from any other regular forum? What benefits are those, if any? Can we all agree on these benefits and reframe "just for fun" into something on-topic and useful, such that it is not just an exception to the normal rules?