I guess some folks feel it's kewl to be seen thus. Others might
have other reasons.
I know I was cynical and at times jaded, for a long while, no
doubts about it. Too much heartache in too short a space of time,
perpetal struggle whilst living a hand-to-mouth existence, family
member(s) not in good health and in various stages of deterioration
and dying, etc...
Whilst it doesn't mean that having it tough means you have an
excuse to be bitter and cynical and jaded, you can't deny that it
IS a huge contributing factor. Nobody's born cynical or jaded, but
sometimes, it's the overwhelming problems in life that pushes one
in that direction. Often, it could be a cry for help gone awry.
This is another angle to look at it.
Now, my situation in life is much better. I no longer live
hand-to-mouth, I'm taking control of my finances because I earn
enough (FINALLY!), my job is far from perfect but it's as good as
it gets for now, and I find that I no longer feel cynical nor
bitter nor jaded anymore! Remove all the things that used to worry
me sick and I find that I'm a happier person now.
It's easy to feel disdain for those who are trapped in cynicism and
jadedness, but I think if we can't offer a helping hand to pull
them out of the quagmire, let's not make remarks that will stomp
them deeper into the pits. Nobody loves to be that way... but
sometimes, bad situations in life cause some folks to become thus.
Not endorsing that response, but just saying that it happens, just
like it happened to me.
As for the bored, I got nothing much to say except - Entertain
Yourself! 
When I used to be in chatrooms
donkey years ago, I used to say, "I'm not responsible for
entertaining you!" 
