Happiness is life lived in acceptance. I agree with your point that we do not have the luxury to take decisions all the time. The decisions made under difficult circumstances reach to a place inside of us which was unknown before that moment. Then, there are decisions made in peace.
I also support the idea that happiness happen to us from time to time. My point is that it happens because you showed it the way.
I'm feeling good to have stumbled across the question. Thank you.