“personalizing’ our religion has never worked.”
The only way to give good advice, is to personalize it. 4 inches is a very good suggestion to ensure one is properly covered at all times in all situations. I do not deny that. However, it is just that, a very practical suggestion. It is NOT halacha, and a Rav must use his seichel when to give certain advice and suggest certain things, and when not. I am not him, and I do not claim to be inside his head to know what motivates him to advise certain things, to whom and when. Regarding your knowledge of his name, that is largely irrelevent to this discussion since you have obviously been guided by someone else to use the 4 inch rule. I am not looking to offer you guidance or to disagree with the advice you were given, that is for your Rav, Husband or father as the case may be.