What is the shverkeit of this Torah? It only becomes shver if you subscribe to American equality, a non-Torah concept. This is a pushut Gemorah that Rambam paskens on. A) The wife has specific responsibilities (it is listed above.) B) If she refuses to carry out her responsibilities, there is a specific method (listed above) how to enforce it. Rambam says with a stick and Rabad says by reducing her essentials, including food.
It should be noted though, that it is a two-way street. The husband has certain responsibilities as well. And if he violates some of them and he refuses to change his behavior, Beis Din is empowered to enforce it, including with corporal punishment.