I think kids are just smart enough to see that an arranger is basically a very controllable glorified CD/MP3 player that deludes a lot of untrained, untalented people into thinking that they're musicians. There are exceptions, of course, mostly here at Synthzone

. But I would guess that less than 20% of dedicated arranger players are competent 'traditional' musicians (including a handful that are actually eeking out a living as one). Just a wild guess, of course.
chas