FWIW, software engineering is _RAMPANT_ with people who are very very poor at teaching, mentoring, and even just explaining things.

I suspect this is because many practitioners had to learn through hard-knocks and entirely by themselves and as a result feel that everyone has to go through the same "rite of passage" of suffering as a clueless newb.

While it is fairly easy for new folks to find "getting started" materials or for pros to get advanced information, there's a huge valley where confusion is the norm and one is reduced to getting down-votes and withering commentary on stackoverflow for deigning to ask a basic question without already knowing the answer.

I think understanding terminology definitely helps but the problem is more deep-seated. One could remain completely baffled with the example Angular answer even knowing the technical meaning of all the terminology.