Based on what I see these days, a lot of people mistake being "cynical" with being "realistic", and those two are not necessarily the same.
Of course, I can see why this happens. When you hear someone say "things aren't all bad", it sounds like they're ignoring the bad things that happen in the world. Hence, when someone points out "actually, that's not true" and begins to list off bad things, people see that are being more realistic.
That's why I see why people are drawn to it -- because they believe themselves to be realistic if they are.
But there has to be a balance between the two of them. It's ignorant to believe that everything is alright, but it's just as equally ignorant to believe everything is going to Hell. It's just not that Black & White.
Being realistic is not being cynical or being positive. Being realistic is knowing both bad and good happen in life and acknowledging that.
I just prefer to take everything with a grain of salt, and that includes both "optimistic" and "cynical" feedback. If someone can't explain to me how I can improve outside of saying "you messed up" or "you did good" -- I don't take that advice, period.
Edit: I also forgot to mention that even with this, there is still the grey area of how people proceed positive and negative things (and that can definitely be connected to how differently everyone's brains work -- depression, emotional experiences, mental health, etc.) But I just went over it with a general sense.