It's simple - most developers aren't using libraries for their personal benefit, but as a part of job, where the company benefits from the library. We can use

It's simple - most developers aren't using libraries for their personal benefit, but as a part of job, where the company benefits from the library. We can use truck drivers as an analogy. Those who work a job (i.e. aren't owners-operators) aren't paying for toll roads and bridges out of their salary. Rather, it's the company which covers the cost of using the infrastructure.