"The Law of Triviality states that the amount of time spent discussing an issue in an organization is inversely correlated to its actual importance in the scheme of things. Major, complex issues get the least discussion while simple, minor ones get the most discussion."
This concept as a tool is about learning how to place value in a task. Your tendency will be to solve problems that you understand, that seem easy to solve. Sometimes those are important, sometimes harder tasks are important. You have to know which outcome is better, what you want.
Of course, it goes the other way too: just because a task is difficult or confusing doesn’t mean it’s valuable.
Original source: Why We Focus on Trivial Things