The thing is what you see as realistic many others here see as being negative. Most fans here hope for a good season from the Blazers, and maybe it's unrealistic on the other side of the spectrum, but hardcore fans tend to aim high in their hopes.
Maybe you are right. Maybe it won't be a good season for the Blazers. Maybe they will miss the playoffs. Who knows. But, it seems better to root for and predict success, then to openly predict and continuously espouse a negative outcome. It also seems unnecessary to criticize dreamful, outcomes adopted by others, even if they might be out of reach.