I think whoever told you this is spot on..
Maybe its what you get used to so if you start out with a gooseneck then you pretty much bear with it. On high work yes a gooseneck can help a lot but on the vast majority of my work I find them a real pain (Scuse the pun)
I carry a spare angle adaptor in my pocket and stick it on when I have say a deep set back window to do but then I take it straight off again.
3 years looking and you still know B+gger all? Ever seen that woman that walks into the shop in Open all hours and can never make her mind up? lol
Anyway in all honesty whatever questions you ask here you will get differing opinions. lol @ dvd to watch!!! It AINT rocket science.
I recently took on an employee and even though he is Polish he could get his head round the fact that gravity pulls downwards. Brush.. rinse well and dont try to do rotten wooden frames or ali frames that have oxidised white coating on them. Ther ya go.. difficult isnt it? NOT!!
Too much BS goes on around WFP. keep the TDS of your water to zero or very near to it.. Scrub then rinse thoroughly and Bobs yer ££ makin man.