Fact is that the standard of the average newly minted CPL holder is low with a few exceptions, those being that the pilot was trained by a good school and/or the pilot has another qualification/trade behind them that has provided him/her with life skills in order to adapt, learn and operate safely as a low time GA pilot, particularly in isolation and in challenging operational environments.
As far as pressed clean shirts, polished shoes, neat grooming and not being on the piss all night and fronting up for work the next day is all very relevant.
GA ready course is a good investment for those considering it, certainly not money wasted as additional skills and valuable knowledge acquired are essential for a low time CPL holder. Forget the IFR rating, get a good solid 1,000 hours PIC that will consolidate the initial CPL training and make you into a better pilot! This can only occur with good training and no bad habits!