I have not read any more material on this topic than you presented. It was posited that information/knowledge led to unhappiness in this presentation.
These findings demonstrate some of the maladaptive by-products
of self-reflection, suggesting that not only is the "unexamined
life" worth living, but it is potentially full of happiness and
joy.
Perhaps I am over-simplifying when I suggest that not examining things leads to ignorance, it is hard for me to imagine _any_other_result_.
There are, in this modern world, more than a handful of unhappy geo-political and global situations. Starvation, War, Poverty, Imminent-any-of-the-above. Should we consider them? Dwell on these unhappy things?
Surely it wouldn't be self-reflection, but it probably has, according to the Lyubomirsky theory, negative internal repercussions which could cause depression.
Tension is critical. Without any, nothing gets done, with too much, people snap. That's the tension in tension :)