OP
NickD
Using your examples, calling a Electrical Trainee an electrician would be like calling a PCSO a policeman, a legal secretary a solicitor or a GP's receptionist a nurse.
Yes, which is why I think the term domestic installer has a place. If one says the term doesn't exist then all you're left with is "electrician" and then people who feel they've spent a decade or two earning that title get narky about it being applied to someone who's spent a lot less time training. What I will say is that I think someone going in for the short courses with essentially no electrical knowledge is a recipe for disaster, probably.