I feel like that's a remarkably pessimistic view of the world. I don't think optimism necessitates "filtering the world out," I think one can be optimistic about the future while being aware of actual problems.

This viewpoint has served me with a perfect success rate in all of my interpersonal reactions, including relatively combative ones (handing a beer can a drunk has thrown on the street back to him and asking if he could throw it away next time, random example).

Are there any specific example of things you think are incompatible with optimism without horse blinders?