You only need one terrible experience to learn from it.
This is something that I have been starting to understand as a human being and a psychology professional.
It turns out, going through one event can completely change the way you see the entire world for the rest of your life! I recognize a lot of us can understand this in regards to violence or painful traumas. It actually takes much less than a massively shocking event to change your behavior forever, for instance, it only took my sibling one long, awful day as a HVAC worker to forever change his yearly routine. On one of his first days after working as a professional HVAC worker for the local HVAC dealership, my sibling was sent to some harshly tough heating and cooling method service works. He was already anxious enough about demonstrating his recently received HVAC certification for real residential HVAC purchasers and then the HVAC dispatcher sent him to the most tough air conditioner and gas furnace service works of the day. My sibling got stuck at each HVAC appointment for many hours longer than he expected. The next thing he knew, he had been absolutely working 11 hours a day and his brain and body were in complete exhaustion mode. He was so fatigued when he left the last air conditioner service that he nearly fell asleep behind the wheel of the HVAC truck. To this day, my sibling is prepared for long, arduous HVAC services. He always keeps an extra mug of coffee and a handful of caffeine pills in his heating and cooling service truck.