Correct. I did not mean to imply that it was a simple mind state shift, i.e. "I'm now going to look at things as opportunities, BOOM! done!", but an ongoing behavioral pattern change, as you alluded to. Nothing happens in an instant. Especially self inflicted behavioral changes, which are extremely difficult and most fail at over the long term.
Shitty things happen to everyone. Feel the pain, hurt, anger it brings, own those feelings, come to terms with them, and move on. Change that shit into something positive. Nothing bad has ever happened to me that didn't turn out to have some sort of positive effect. Family death, horrible accidents, broken hearts, money lost. It all hurt me, sometimes momentarily destroyed me. But down the road, I'm better for all of that shit.
It's not so much "when shitty things happen, smile and enjoy it", but rather "when shitty things happen, acknowledge the shitty aftermath, but trust/believe that the positive will be revealed in due time". The universe has a way of righting itself. However, it also has a way of giving you what you ask for. Most people with consistent, drama-filled lives secretly enjoy it, ask for it. It's their drug. It gives them purpose and meaning. It's much easier to deal with a whole bunch of shitty things happening than serenity. In times of serenity, there's not much going on other than what's inside you. And that's a scary place for most people to reside in.
ALright, tangent over.