Only if it is your desire to happy.
But, anger, all emotion do have a cause, and a high purpose. Not being able to see that cause or purpose at the level that you operate does not invalidate them. If 95% have no cause how do you decide which 5% do have a cause?The cause may be a halucination and is none the less, real cause the only reality you can percieve is your own. Emotions are there to inform us and compell us in a particular direction. Where thigngs get messy are in the denial of the emotion, and then continue to do so. They say that "boys don't cry". And yet boys do cry, and fear, and grieve. And if you continue to denie the fact that "boys don't cry" you eventually get angry. Angry that you are denying the part of you that fears. How can you love when you are constantly angry at yourself. Yet you can't blame yourself. So you Blame the world instead. The solution of course is to live and acknowledge that fear. And consquently love yourself.
Enlightenment will not normally come from sitting on a rock for 20 years. A rock cannot challenge you to evolve. It comes from living life with open senses. From understanding that whatever you experience, it is just a hallucination and can change in a moment with a thought.
In the same way Enlightenment happens in a moment. Those decades of realization are but a memory and therefore, also a halucination. And when you strip away the halucination what is left is enlightenment. Which is a fancy word for seeing things as they are. And that is energy. Which is the same for all.