i've heard business leaders express the suspicion that sw eng teams are trying to avoid accountability by claiming estimating is too hard.

and every time i've seen people try to correct for this it results in different layers of management adding arbitrary fudge factors to the time estimate which inflates the actual time that it takes to do something. these corrections build inefficiency into the beginning of the project and bake them in.

it's an answer to "how do we not be wrong about when things will be done?" over "how do we move faster?"