Too many cooks spoiling the broth.
Likewise, a person who is overwhelmed by
too much thinking, which is useless, mess up the result eventually.
When I was young, I dislike simple art work because I felt it is effortless acting.
However, I realized that being simple is the most hardest action since it must know how to limit yourself first.
Sometimes, people don't know that they are the same people and judge, evaluate, and question each other.