The purpose of the filter is to save face for all concerned, in my case. I've been told what I say seems unedited. It's just my native standards are utterly unlike the norm. I couldn't even see the norm. I had to try and learn it and it still fits about as well as starched cardboard underwear after you went out in the rain. The purpose of the filter is to attempt to cultivate some semblance of belonging. Can't be myself with many people, just husband.
My two bits.

Not about fear, per se. More about maturity (effort towards) and avoidance of predictable suffering and disadvantages.