The way it's been used in Wing Chun in recent times, is to add an aura of mystery and intrigue where none is necessary, unless you are trying to create a type of clique or cult from which outsiders can be patronised or condescended to.
As Geoff Thempson said, and as an article by Phil Bayer I read recently also alluded to, the most important thing is to learn to "HIT F***ING HARD".
OK so I'm probably guilty of using the word "engine" talking about wing chun punching power. But that is probably because I work on feel a lot more first than visuals. To me the wing chun "method of producing power" (to be politically correct) feels more like a wave and boxing feels more like crank rotation. YMMV. No intention of mystery or intrigue just describing a feel difference for me. Can't speak for anyone else w/r to auras and condescension.
I think that both boxing and wing chun have an aim to hit hard. Heavy bag uppercut bag for boxing - part of daily is bag work.
Do you have a link to that article? Would be interested to read. TBH I never have thought of PB as a power puncher no offense.