Kasha-
I don’t understand your question. I said that the general rule is to do what is normally expected in any given society. When heretothere asked for specifics I said I don’t know. I could guess, and my guess would be that washing feet is not included in our day and age, and maybe preparing a Shabbos meal is. But I don’t know, so I told him the best thing is to ask your rav. I was simply defending a very basic concept mentioned by SJS, that the application of a rule can change over time although the rule remains the same.
That which you say “no one denies”, I deny. Show me a makor that a woman is OBLIGATED to obey her husband, as a general principle.