Theres no consensus on this.
Actually stupid questions, like ones intended to be offensive, or unanswerable debates like Apple vs android, do get downvoted.
If OP is genuine, or if the discussion is engaging, then upvote it.
No that’s not what it means.
Its from the phrase teachers like to say: there are no stupid questions.
The idea being, dont be embarrassed to ask a question others might see as stupid, because by learning the answer you will be less stupid, or something.
Downvote content that is harmful to the community or instance, report additionally if it’s against the rules of either. Upvote good content and ignore the rest. Block whatever you feel like.
Though I suspect your question is more about what the community description means. Answer should be in there.