Downvotes/dislikes are a great way to weed out misinformation and low quality content
That simply does not happen. Even so, the report button exists for dealing with both situations – you don’t need a 2nd option (which can be easily manipulated, considering there is no age gap and/or restrictions – even your toddler can flag your post as “low quality content”). In other words… that is why we can’t have nice things.