Why the more subtle things are, the more terrible they are?

In the 1970s, an American meteorologist named Lorenz explained the theory of air system, saying that the wings of a butterfly in the Amazon rainforest occasionally vibrate, which may trigger a tornado in Texas within two weeks. Butterfly effect refers to a very small change in initial conditions, which will have a great impact on its future state after continuous amplification. Some small things can be confused, and some small things are very important to an organization and a country if they are amplified by the system, so we can't confuse them. So many times, a small butterfly can cause a huge reaction, which will make people feel scared.