Untested assumptions and lazy habits of thought can be shown up, once put in a spotlight of a different hue.
If we find it hard to believe that winning millions might not be so lucky after all, we just don't have a good enough imagination. If I fantasise about winning the lottery, it doesn't take long before all sorts of worrisome potential consequences occur to me.
Anger clearly has its proper place at work, which is neither wholly absent nor ever present. The manager who is an emotional blank is just as hard to work for as the volcanic boss, and both can do great harm by setting an unhelpful example for what kind of emotional expression is expected and accepted.
To become a stoic is to endorse the truthfulness of its world view and accept its prescription for how you ought to live, not just to like how it makes you feel.
Big sporting events and spectacles might give the national morale a shot in the arm, but they are too transient and taste-specific to stand as robust symbols of nationhood.
When you try to cool down hot emotions, what tends to happen is that you end up either repressing them or losing them altogether. Neither is desirable. Without emotion, much social interaction loses its meaning or changes for the worse.