Good landladies—those who are superb cooks and launderers, are figures as popular in fiction as the bad ones who terrorize their guests and overcharge them at the slightest opportunity.
They realize they are unsuitable to become the engineer or the physicist, realize that they will not be good at financial accounting or the work related to counting .
You can see that many scientists are good at playing music: Einstein played the violin, and German physicist Max Planck was talented in playing the piano.
He's not even very good with theoretical physics. After a brief conversation about centres of gravity, he admits that he failed his O-level in the subject.