I really don't understand your point. Different households are always going to have different arrangements regards things like chores.
I don't think the original comment said anything along the lines of "here is an equation that everyone needs to apply in order to decide who does the dishes".
Just that if you have a situation where one person has significantly more free time than the other it wouldn't seem unreasonable to expect them to do more chores. Of course in real life there can always extra variables that complicate things. These things usually manifest themselves as domestic arguments, so are best discussed up front.
I don't think the original comment said anything along the lines of "here is an equation that everyone needs to apply in order to decide who does the dishes".
Just that if you have a situation where one person has significantly more free time than the other it wouldn't seem unreasonable to expect them to do more chores. Of course in real life there can always extra variables that complicate things. These things usually manifest themselves as domestic arguments, so are best discussed up front.