You're really not reading what I've been writing, have you?
Now, I never wrote, intimated, suggested or meant that you should not be certain of anything in this world. Everyone should be allowed to be as certain as they want to be. Faith helps you to fill in those gaps that might make you less certain. Faith allows you to extrapolate and interpolate your world when you don't have all the data you would like. You don't really know, but you can say you do because your interpretation of your experiences to this point all suggest that you are right.
Everyone has a cognitive bias. We tend to see and interpret only that which agrees with our beliefs. The bigger our bias, the harder it is to see that much of what we believe or disbelieve may have more than one interpretation or even evidence that contradicts it. Our certainty actually blinds us to seeing the other perspectives.
That's why I work at keeping as close to a neutral stance as I can. I want to understand my friends' beliefs and why they believe what they do. I've tried to be an atheist and an agnostic, but I'm just not wired that way. I'm not a Bible thumper by any means and I try to keep open minded. I try not to be a FIGJAM kind of person, but then we all have egos. I hope this helps.