Knowing the market value of a person (including oneself) is a business skill, and distinct from the skill of software engineering. Being bad at this means eithe

Knowing the market value of a person (including oneself) is a business skill, and distinct from the skill of software engineering. Being bad at this means either overestimating or underestimating the value. Most people are going to underestimate their own worth if they need a job, but it shouldn't be too shocking when people err in the other direction sometimes.