What determines what skills can be taught as apprenticeship?

Prevous question I mean a paid education.

I think apprenticeship does exist in medical field.

It is called Residency.

But you still need basic training.

It is like a apprentice for electrician that doesn’t know basic math. Nobody wants to teach you how to multiply when they are trying to work and also teach you.

A rose by any other name..

····Could you please tell me the meaning of “A rose by any other name..”?
@stanleybmanly

It means whatever you call it, it still “smells as sweet”