Who has ever heard of serious people becoming enlightened? The serious person cannot become enlightened. Seriousness is a disease; it is the cancer of the soul.
Seriousness is a wrong, utterly wrong approach to life. How can you come to truth through a wrong approach? The serious person is simply ill, pathological. Of course, for thousands of years serious people have dominated us because that is their only joy in life, there is no other joy for them -- the joy of dominating.