Because I think too much. If I think about everything, it will make the problem more and more complicated.
It is the specialty of professional managers to complicate simple problems, because only after they are complicated can they appear knowledgeable and valuable, and they will be happy if they can say what others can't understand.
There is a feeling of showing off.
Actually, life is not that complicated. Might as well simplify it.
Happiness is based on simplicity. When you get rich, you will have more troubles.
So it can be more complicated when it is complicated, such as scientific research.
Be simple when it's time to be simple. Don't worry about trifles in life.