ewwwwwwwwwww
What you are talking about is sex for sex, which somehow makes the guy feel “happy”, whether or not it makes the wife feel “happy”. So, he gets what he wants, what about her?
It’s about building a family, not at anyone’s expense, but to the benefit of the members.
You didn't read the whole passage. Particularly the part about "In the same way, the husband's body does not belong to him alone but also to his wife".
Marriage is about each belonging to the other, with obligations to make an effort to keep the other happy. It's not all one way, in either direction.
The wife making her best effort to keep the husband happy gives her the right to expect reciprocal treatment. Refusal means she loses any rights to any expectations.
In current society, even as "liberated" and "equal" as it purports to be, the man is under the primary obligation to ensure that the family is provided for, even if that means the job he has to work is stressful, unrewarding, dangerous, or injurious to his long-term health. That's how it is, and men accept that.
If a woman came to you and said "My husband decided that his job as a hedge fund manager was too stressful, and has decided to make a go of it with a small rock band. This means we can't afford the mortgage on our house any more and would need to move to an apartment", would you tell her "Well it's his life, and his decision, deal with it", or would you start filling out her divorce papers for her?