Pfft, I had people stuck for weeks! *Puffs up*
With everyone being happy, people soon find the feeling diluted, senseless, their general happiness contributing to a society of blandness and little emotion. There is no drama, no sadness, no excitement, no thrills and chills, only the enduring, deadpan, happiness. One cannot mourn for the loss of a loved one, cheer for a great accomplishment, they are all simply and dolefully happy.
I wish that life was a box of chocolates. And not the nutty kind please!