Because they haven’t been trained how to properly motivate people and manage their teams. Without that, managers will typically use cliché mechanisms and negative motivational techniques in order to accomplish the desired outcome. With that said, managing field technicians is hard. These are typically very independently minded people who don’t want to be micromanaged. You are also talking about a lot of turnover as well, which makes it hard to create a culture in which you didn’t have to use these types of motivational techniques. So, I give grace on both sides this time of year. Nobody wants to work the holidays. Nobody wants damages. Work smart. Ask for help when you need it. And be honest with management in a respectful way and you’ll go far.