Perhaps more than anywhere. Science is a process of challenge and response, not a static body of knowledge.
> Presumably the purpose is to answer from established science.
"Established science", which is still subject to debate itself, isn't what link aggregators cover. They bias towarss stuff more like science news and novel study outcomes, which are nothing to do with established science except as a seed for critical discussion.
Even if you were right that debate on the shape of the earth had no benefit, forbidding it still wouldn't be science. Science is not coextensive with beneficial things.
If you assume that all opposing opinions come from flat-earthers and idiots that couldn't possibly be right about anything you will never even think about changing your opinion on anything. You'll continue to chat with other reddit yes-men and pat yourselves on the back about how you're all so right.
The upvote / downvote self-censorship system simply does not work for any serious discussions. It might be ok for sorting the snarkiest comment under an article but that's about it
I am not, in fact, denying you space for your views. I'm giving you the space for your views and explaining to you why they are incorrect.
Even in fairly niche subs I find that "surface level" content quality dominates and nuanced takes are frequently unpopular which is basically a recipe for anyone who knows anything to leave. I find the best subs are satire subs because having to know enough about something to be able to satirize it weeds out all the people who create and perpetuate surface level content. I assume there are some super niche subs that are similar.