There is the spirit of the law and the letter of the law...if the spirit is missing we get a rigid and harsh law, if the letter is missing we get too much tolerance and everything becomes permissible. Balance is needed in particular situations and only a very enlightened and aware man will know when to choose a particular method over another. Rasulullah had his wives (RA) argue with him sometimes, and he is the noblest creation...so the hadith kind of shows this side of his character, yet he also separated himself from them for a month...which shows another side to his character.