Not sure who needs to hear this. But all utterances are opinions. The ones you **Beleive to be facts** may be correct or not, but even if it happens to be correct it is still only your OPINION that it is a fact.

We should and do utter things as if they are facts because since all things are opinions without exception this is just linguistically easier. But if your criticizing something for a distinction between opinion and fact your probably already misunderstanding the idea. All utterances are opinion, full stop.