The Burnout Risk
Because of brain plasticity dynamics, when we repeat behaviors - including thought patterns or emotional reactions - the brain wires itself to make these behaviors automatic. Basically, anything we do repeatedly - get mad in traffic, roll our eyes at our boss, get stressed at calls from a certain colleague - gets hard wired into our brain as a default reaction. As a result, a series of bad moods can become a fixed mindset over time, leading to burnout.
Mood Contagion
A 2018 Wharton study found that moods are contagious within the organization. Moods not only spread virally, they were shown to seriously impact group dynamics, employee performance, and relationship with clients/customers. What this means is that one employees bad mood can become a much bigger problem in no time.