"There are horrible people who, instead of solving a problem, tangle it up and make it harder to solve for anyone who wants to deal with it. Whoever does not know how to hit the nail on the head should be asked not to hit it at all"

This quote by Friedrich Nietzsche is slamming individuals who make issues worse by complicating them rather than finding solutions. The author is suggesting that people who lack the capability to resolve issues efficiently must refrain from attempting to do so. The expression "hit the nail on the head" describes discovering the most direct and reliable service to an issue. For that reason, Nietzsche argues that individuals who can not do so should not try to fix the issue at all, as they will just create more issues.