Have you ever walked from your van to the front door of a service call with a heavy tool bag in one hand and found it hard to walk because the weight is distributed so unevenly compared to the hand that is carrying little or nothing? The inequity in weight throws us off balance and makes walking to the front door harder than if we had an even amount of weight in each arm.
The same can be said for the skills of a technician. When a technician is too focused on only their technical skills without the soft skills training to balance out their performance, they end up struggling to please themselves, their clients, their supervisors and their company.