Saying that something is wrong doesn't imply (at least for me) that you're 100% sure that it's wrong. I always consider colloquial affirmations to carry an implicit degree of confidence, which is rarely 100%, and I often try to make that explicit by phrasing it like "I think that ...", etc.

So, yeah, I don't see a conflict on thinking something is wrong, pointing it out, and arguing for change, and at the same time be open to be convinced that it wasn't, in fact, wrong.