Wasnt ever to do with God.....as ive said before yes some will claim to be Jw and will do wrong,others will make mistakes....but these petty things shouldnt ever push us away from Jehovahs love,which is what satan wants and is succeeding sadly.
Some congregations wont let you give public talks in a coloured shirt,these are things that satan will use and yes imperfect men either unknowingly or deliberately are doing things that arent needed or that Jehovah wouldnt actually be bothered about (ie the shirt or goatie) BUT would that really stumble someone who loved Jah? I dont go to the meetings for the men there,or dress to please them etc...i was baptised for Jah and i do things to please him,thats why silly mistakes dont bother me in the slightest because im staying focused....satan can fight all he wants but i have more important things to be dealing with then worrying if a brother can wear a certain shirt or grown a goatie.
The Gb change with time within reason,always staying with morals and principles.