[David]

That's basically where I'm at (speaking of redundancy).

I'm usually afraid to say something wrong, since I know that there are always experts on the topic of the post. It makes more sense to me to let said experts explain a particular topic than to possibly disseminate wrong information, even though I might have a useful perspective to add.

[patd]

People shouldn't be afraid to say something wrong. If you say something wrong, people should correct you and everyone will learn (including readers that don't know anything about the subject).

The issue is if people that see that you're wrong, instead of correcting you, just downvote you. In my opinion, a wrong statement should not be buried with downvotes, it should stay at 1 point with a reply that corrects it and that get a lot of upvotes.