Ask if you're interested
Back in the day, if we guessed a system wrong, it was usually because the question was genuinely interesting in another system. Then we'd repost the question we thought it was and the answers based on that system and the question for the OPs real system would also get answered and we'd end up with two (or, well, at least one) decent q&a's. Or, at least, that's how it went when things went best.
Similarly, if you have a genuinely interesting question in mind in response to reading a putatively 'unclear' question, you shouldn't let the fact you think that's what the OP is asking already prevent you from asking it separately-- that would assume you can correctly guess the system. Instead, assume that you may have not correctly guessed the system, and so your question isn't a dupe and doesn't prevent the OP's question from being re-opened, provided they actually secretly meant a different game that just happens to match very closely all the indicators you were looking for to tell it was the game you were thinking of, possibly down to an abbreviated form of the name, publication year, book titles, and trademarked and copyrighted materials/branding.
Asking helps new users
Besides making fake sense in our legal paradigm for system-tag-handling, this also makes actual sense. While you seem to think that having their question asked by a different user will put people off from this site, I can tell you from direct experience that it is actually the exact opposite situation. Every time I have stepped in and re-asked a new user's question with a complete and substantial rewrite to the point that it would not be an acceptable edit, they have been quite grateful. New users don't care that much about rep, they care about getting their actual real-life problems solved, and re-asking their questions for them when they are overwhelmed by our site's frankly rediculous treatment of new users and the effort required to proceed is very large for them saves them a great deal of tribulation, teaches them how to use the site way better than just making them do it themselves all the time does (for all the 'they'll learn best by doing' out there, actually giving people examples and explaining how it's done and why is still a significant part of how we do it in schools for a reason), and gets them the answer they need right now in the simplest fashion.
An example of this in practice is: How to make your players hate your villain, but not your game
It wasn't the user's first question, mind you, but it was pretty early in their learning process here.