Actually, no you don't just have to accept them, or anything (at face value).
Do you accept every opinion you see on the news or in newspapers/magazines?
Do you accept the opinion on a subject from everyone you meet?
If not, why not? I'd bet that you are not an expert in all fields that you hear opinions on in the media (I'm certainly not) but that does not detract from your ability to apply critical thought to these opinions. Seek other opinions on matters that interest you and then balance up the arguments.
The only difference between you and a practicing sceptic is that "we" usually don't accept a "fact" at face value, as you seem to be implying above that you do.
You can still be open-minded (say on the existence of UFO/Aliens) and sceptical.
In fact, by definition, to be sceptical you MUST be open-minded to new facts and concepts.