Not true.
My eldest just got a job at a law firm. He was only there a month when he got his first recognition award by the company for performance. He substantially outperformed the middle aged woman who held the position before him, getting work done accurately in half the time.
He arrives early, leaves only when his duties for the day are done, is smart, conscientious, and eager to learn.
My middle child is always getting called in for extra shifts and closings because he does a thorough job, every time. The opening managers never complain when my child closes the night before.
My daughter in law is also called in for extra shifts at the hospital. She is in college to be a RN.
It all depends on how they are raised.
I allowed for the exception in my post.