Well, yes, but new developers need to learn to always delve one layer beneath any abstraction they're using, and understand it. Usually they learn this the hard way by fighting with some abstraction until in a fit of insanity they dig beneath the surface (looking at the library source code or something) and realize that either (a) the docs were lying or (b) the code has a bug or (c) their understanding of what the abstraction was even capable of was wrong.