The validity of the fast. Esther's fast for what???

What is the point of fasting the Fast of Esther? The matter is accepted in the words of Maimonides, beginning of the fifth chapter of the Laws of Fasts, which gives fasts a current meaning. However, all this is in fasts that are words of Kabbalah, the Fast of Esther has nothing to do with current affairs. What will help me to fast in memory of… Who is interested in this memory? Why am I supposed to fast because 2500 years ago in an ancient country on the borders of Iran they fasted. Jewish history is full of fasts for all kinds of atrocities and decrees, and we have never had to remember the fact that they fasted. Is there any logic in this fast?