Bringing up because of this question:
I think it would be appropriate to tag the question correctly with the extra tag (see comments to question), obviously OP does not because it could spoil (not sure how).
It's not an inherent spoiler because you're not obviously given the context. The tag would be only a minor spoiler, and only if you view the question. In this case, the question is about a broader topic to try and avoid a spoiler, so it doesn't need the series tag. If the question's title were (massive star-wars spoiler ahead)
In The Mandalorian, why did Yoda's clone eat a frog?
then I would be inclined to edit, but it would need the series tag, since it would be specific to that series.
Tags exist so we can easily reference questions later. Not tagging a question about a specific topic is a disservice to people looking for the question.
The system is set up for the user who does not want to be spoiled to take steps to do so.
Luckily, SE provides us with an easy avenue to do so, ignoring tags.
If a user wants to avoid spoiler for a specific franchise they can if the question is tagged properly.
For the particular question I have no reason to hide general star-wars questions, however I definitely do want to hide the-mandalorian questions as I have not started watching it yet. If the question is not tagged properly I can not do this.